Method for optimizing steel wire recording digital audio quality

Abstract

The invention discloses a method for optimizing steel wire recording digital audio quality, which comprises the following steps of: S1, measuring abrasion of a main shaft and a belt pulley of a steel wire recorder, and adjusting a tolerance to be within an original design range; s2, the magnetic head is cleaned through ultrasonic waves, and metal coating is conducted again; s3, controlling power supply voltage fluctuation by adding a voltage stabilizer; s4, analyzing the audio signal in combination with a spectrum analysis tool, separating distortion and noise components, and performing noise reduction processing by using a spectrum De-Noise technology and a dynamic threshold value; and S5, expanding a frequency range through a Spectral Recovery technology, and carrying out equalization compensation on the signal by using MusicRebalance. According to the method, mechanical structure optimization, magnetic head performance recovery, power system stability improvement and a digital audio processing technology are combined, so that the digital audio quality of steel wire recording is remarkably improved, the sound quality of recording is optimized, noise interference of equipment is reduced, and audio playback is clearer and more real.

Description

Technical Field

[0001] This invention relates to the field of audio signal processing technology, and in particular to a method for optimizing the digital audio quality of wire recordings. Background Technology

[0002] Wire recording, as an early method of audio recording, held a significant position in the field of audio recording in the early to mid-20th century due to its relatively unique technological background and application value. Wire recorders achieved audio storage and playback by converting sound signals into mechanical vibrations and recording them through a magnetic wire. However, with the development of digital audio technology, wire recorders were gradually replaced by other high-fidelity devices. Nevertheless, wire recording still holds unique value in certain fields and among collectors. Wire recorders possess classic sound quality characteristics, but due to technological limitations, sound quality is often affected by equipment aging, environmental factors, and the recording technique itself, resulting in poor audio quality, especially in the high-frequency range and spatial aspects of the audio.

[0003] In existing wire recording equipment, prolonged use leads to wear and tear on the mechanical structure, particularly the misalignment of the main bearing and drive plate. This uneven tension in the wire tape during operation causes vibration during recording, affecting audio stability and clarity. Furthermore, the power supply system in wire recorders often uses outdated paper capacitors and vacuum tubes, and voltage fluctuations can cause magnetization, leading to audio signal instability and distortion, resulting in reduced sound quality. Over time, the magnetic head of the wire recorder also experiences a gradual decrease in frequency response due to metal wear and magnetic gap contamination, especially in the high-frequency range, causing sound quality degradation during playback. More seriously, the frequency response range of wire recording tapes is typically limited, resulting in poor audio reproduction, particularly in the higher frequency ranges, with significant loss of spatial depth.

[0004] Against this backdrop, existing technologies have significant limitations in optimizing the digital audio quality of wire recordings. While traditional repair methods such as head cleaning and mechanical adjustments are widely used, these methods only partially address the aging of mechanical equipment and cannot fundamentally improve the digital audio quality. In particular, existing technologies remain inadequate in areas such as accurate audio signal recording, distortion detection, noise suppression, and spatial compensation. These traditional methods rely primarily on manual adjustments and simple audio processing, lacking detailed and dynamic optimization of the audio signal throughout its entire lifecycle, thus failing to fully restore the original sonic characteristics of the audio recorded on the wire tape.

[0005] Therefore, based on the shortcomings of existing technologies, this invention proposes a novel optimization method that addresses the various deficiencies in audio quality of wire recording equipment by combining modern high-precision audio processing technology and equipment optimization techniques. Firstly, at the physical level, this invention proposes methods such as mechanical structure calibration, magnetic head performance restoration, and power supply system optimization to ensure the operational stability of the equipment and reduce sound quality degradation caused by equipment aging. Secondly, in terms of digital audio processing, this invention employs high-precision audio recording and reconstruction technology. Through high sampling rate and high bit depth digitization, it accurately captures every detail in the recorded signal and, combined with spectrum analysis tools, clearly identifies and separates distortion and noise components, thereby providing high-fidelity audio restoration at the digital audio level. Finally, this invention also proposes noise reduction technology for the unique noise and mechanical noise of wire recording equipment. Through dynamic threshold adjustment, noise elimination is achieved while maintaining the integrity of the original audio signal to the greatest extent. Simultaneously, through spatial compensation and spectrum restoration techniques, the frequency response range of the recording tape is expanded, restoring the spatial sense of the audio and improving the layering and clarity of the sound quality.

[0006] In summary, the shortcomings of existing wire recording digital audio quality optimization technologies mainly lie in equipment aging and the limitations of traditional audio processing methods. This invention, by combining equipment optimization and modern audio digital processing technology, provides a systematic and comprehensive solution. It not only effectively repairs the mechanical problems of wire recording equipment but also significantly improves audio quality through digital means, solving the problem that existing technologies cannot fully restore the sound quality of wire recording tapes. This invention possesses significant technological innovation and application prospects. Summary of the Invention

[0007] One objective of this invention is to propose a method for optimizing the digital audio quality of wire recordings. This invention fully utilizes equipment optimization technology, digital audio processing technology, and spectrum analysis technology, and details how to comprehensively optimize the audio quality of wire recordings through methods such as mechanical structure optimization, magnetic head restoration, power supply system stability improvement, digital noise reduction, and spectrum restoration. Through high-precision audio recording and reconstruction, and dynamic threshold noise reduction technology, this invention can effectively reduce the impact of mechanical noise and equipment aging, and expand the frequency response range of the audio through spatial compensation, restoring the clarity and layering of the sound quality. This method has the advantages of significant sound quality improvement, efficient noise cancellation, and simple and easy equipment optimization.

[0008] A method for optimizing the digital audio quality of wire recording according to an embodiment of the present invention includes the following steps:

[0009] S1. Measure the wear of the main shaft and pulley of the wire recorder and adjust the tolerance to the original design range;

[0010] S2. Clean the magnetic head with ultrasonic waves and re-coat the metal.

[0011] S3. Control power supply voltage fluctuations by adding a voltage regulator;

[0012] S4. Combine spectrum analysis tools to analyze audio signals, separate distortion and noise components, and use spectrum de-noise technology and dynamic thresholding for noise reduction.

[0013] S5. Extend the frequency range through SpectralRecovery technology and use MusicRebalance to perform equalization compensation on the signal.

[0014] Optionally, S1 specifically includes:

[0015] S11. Turn off the wire recorder and disassemble the main shaft and pulley components, then clean the surfaces.

[0016] S12. Use a micrometer to measure the diameter d1 of the spindle and d2 of the pulley to determine the wear area, measure the wear depth in different areas, and check the dimensional tolerances of the spindle and pulley.

[0017] S13. Inspect the wear pattern on the surface of the spindle and pulley, including dents and cracks, and check the geometric tolerances;

[0018] S14. The spindle and pulley are worn. Use professional tools to adjust the geometric and dimensional tolerances to the original design range.

[0019] Optionally, S2 specifically includes:

[0020] S21. Prepare an ultrasonic cleaner and electronic component cleaning solution.

[0021] S22. Disassemble the magnetic head and check the surface of the magnetic head for contamination, rust, or other physical damage to determine the parts and extent that need to be cleaned.

[0022] S23. Place the magnetic head into the cleaning tank of the ultrasonic cleaner, ensuring that the magnetic head is completely immersed in the cleaning solution. Set the cleaning time. After cleaning, remove the magnetic head and gently wipe the surface of the magnetic head with a non-woven cloth to remove any residual cleaning solution.

[0023] S24. If there is metal wear or corrosion, the metal coating needs to be reapplied. Place the magnetic head in the electroplating tank and use electrolysis to evenly cover the key contact surfaces of the magnetic head with a metal coating. The key contact surfaces are all contact surfaces affected by wear or corrosion.

[0024] S25. After cleaning and metal coating are completed, the magnetic head is reinstalled on the wire recorder and tested. The audio signal is analyzed using a spectrum analyzer.

[0025] Optionally, S3 specifically includes:

[0026] S31. When using a voltage detection device to check whether there are voltage fluctuations when the wire recorder is working normally, if voltage fluctuations are found, record the range and frequency of the voltage fluctuations.

[0027] S32. Select an automatic voltage regulator and install it.

[0028] S33. Based on the voltage requirements of the wire recorder, ensure that the output voltage of the automatic voltage regulator is consistent with the design voltage of the wire recorder;

[0029] S34. Start the wire recorder and confirm that the equipment is operating normally and the voltage is stable.

[0030] Optionally, S4 specifically includes:

[0031] S41. Connect the RMEADI-2Pro audio interface to the output of the wire recorder, set the sampling rate to 192kHz and the bit depth to 32bit on the RMEADI-2Pro, and start recording audio signals using the RMEADI-2Pro.

[0032] S42. Open the spectrum analysis tool AudioAnalyzer to receive the recorded audio signal;

[0033] S43. Examine the spectrum to identify distortion and noise;

[0034] S44. Select the Spectrum De-Noise tool and load the noise spectrum data of the blank audio. Set the threshold of the noise reduction tool to determine the frequency range and amplitude of noise cancellation;

[0035] S45. Apply the De-Noise function to automatically remove noise components from the recording.

[0036] Optionally, S5 specifically includes:

[0037] S51. Import the audio files from the wire tape recording into the audio processing software iZotopeRX;

[0038] S52. Use the spectrum analysis tool AudioAnalyzer to view the frequency range of the audio and identify the missing frequency bands;

[0039] S53. Start the SpectralRecovery tool, set the frequency range to 5kHz to 15kHz, perform spectrum recovery, and reconstruct the missing high-frequency part;

[0040] S54. Use the MusicRebalance tool to adjust the gain of low, mid, and high frequencies to ensure audio balance and harmony. Monitor and adjust in real time to ensure the naturalness and clarity of the audio.

[0041] S55. Export the processed audio file.

[0042] The beneficial effects of this invention are:

[0043] First, this invention significantly improves the stability and audio quality of the wire recording device by optimizing its mechanical structure and restoring the performance of the magnetic head. Precise calibration of the main bearing and drive disk reduces audio jitter caused by uneven tension, effectively minimizing mechanical noise interference with the audio signal. Furthermore, ultrasonic cleaning and metal coating of the magnetic head restores its high-frequency response to near-original levels, significantly improving high-frequency attenuation issues in wire recording.

[0044] Secondly, this invention optimizes the power supply system of the wire recorder, solving the voltage fluctuation problem caused by old capacitors and vacuum tubes, and reducing the occurrence of magnetization. This stable power supply system ensures accurate transmission of audio signals, avoids distortion caused by power instability, and further improves the fidelity of sound quality.

[0045] Furthermore, this invention combines modern digital audio processing technology, employing high-precision recording and reconstruction methods. Through high sampling rate and high bit depth digitization, it accurately captures and reconstructs audio signals. Spectrum analysis technology enables us to clearly identify and separate distortion and noise components in wire recordings. Dynamic threshold noise reduction technology effectively removes the unique noise and mechanical sounds in wire recordings, preserving the clarity of the original audio to the maximum extent.

[0046] Finally, by employing spectrum restoration and spatial compensation techniques, this invention successfully expands the frequency response range of wire recording tapes, thereby restoring the spatial and stereoscopic quality of the audio and making the audio more harmonious and clear. The combination of these technologies comprehensively improves the sound quality of wire recordings, overcoming the shortcomings of traditional techniques and fully unlocking the potential of wire recording equipment. Attached Figure Description

[0047] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0048] Figure 1 This is an overall flowchart of a method for optimizing the digital audio quality of wire recording proposed in this invention; Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0050] refer to Figure 1 A method for optimizing the digital audio quality of wire recordings includes the following steps:

[0051] S1. Measure the wear of the main shaft and pulley of the wire recorder and adjust the tolerance to the original design range;

[0052] S2. Clean the magnetic head with ultrasonic waves and re-coat the metal.

[0053] S3. Control power supply voltage fluctuations by adding a voltage regulator;

[0054] S4. Combine spectrum analysis tools to analyze audio signals, separate distortion and noise components, and use spectrum de-noise technology and dynamic thresholding for noise reduction.

[0055] S5. Extend the frequency range through SpectralRecovery technology and use MusicRebalance to perform equalization compensation on the signal.

[0056] By measuring the wear of the main shaft and pulley of the wire recorder and adjusting the tolerances, using ultrasonic cleaning to clean the magnetic head and re-coating it with metal, adding a voltage regulator to control power supply voltage fluctuations, and combining spectrum analysis tools to analyze audio signals and using spectrum de-noise technology for noise reduction, while expanding the frequency range with Spectral Recovery technology and using Music Rebalance for signal equalization compensation, this invention effectively improves the sound quality of wire recording equipment, reduces mechanical noise and distortion, and restores the clarity and spatiality of the audio.

[0057] Optionally, S1 specifically includes:

[0058] S11. Turn off the wire recorder and disassemble the main shaft and pulley components, then clean the surfaces.

[0059] S12. Use a micrometer to measure the diameter d1 of the spindle and d2 of the pulley to determine the wear area, measure the wear depth in different areas, and check the dimensional tolerances of the spindle and pulley.

[0060] S13. Inspect the wear pattern on the surface of the spindle and pulley, including dents and cracks, and check the geometric tolerances;

[0061] S14. The spindle and pulley are worn. Use professional tools to adjust the geometric and dimensional tolerances to the original design range.

[0062] By shutting down the wire recorder and disassembling the main shaft and pulley components for surface cleaning, using a micrometer to measure and identify the wear areas, checking the dimensional and geometric tolerances of the main shaft and pulley, and adjusting the geometric and dimensional tolerances of the wear areas to the original design range using professional tools, this invention effectively repairs the mechanical wear problem of the wire recorder, ensuring stable operation of the equipment and restoration of sound quality.

[0063] Optionally, S2 specifically includes:

[0064] S21. Prepare an ultrasonic cleaner and electronic component cleaning solution.

[0065] S22. Disassemble the magnetic head and check the surface of the magnetic head for contamination, rust, or other physical damage to determine the parts and extent that need to be cleaned.

[0066] S23. Place the magnetic head into the cleaning tank of the ultrasonic cleaner, ensuring that the magnetic head is completely immersed in the cleaning solution. Set the cleaning time. After cleaning, remove the magnetic head and gently wipe the surface of the magnetic head with a non-woven cloth to remove any residual cleaning solution.

[0067] S24 If there is metal wear or corrosion, the metal coating needs to be reapplied; the magnetic head is placed in the electroplating tank, and the metal coating is uniformly covered on the key contact surfaces of the magnetic head using an electrolytic method. The key contact surfaces are all contact surfaces affected by wear or corrosion.

[0068] S25. After cleaning and metal coating are completed, the magnetic head is reinstalled on the wire recorder and tested. The audio signal is analyzed using a spectrum analyzer.

[0069] By preparing an ultrasonic cleaner and electronic component cleaning fluid, disassembling and inspecting the surface of the magnetic head for contamination or damage, cleaning the magnetic head with an ultrasonic cleaner to remove residual cleaning fluid, and re-plating the metal using an electrolytic method in cases of metal wear or corrosion, the magnetic head is finally reinstalled in the wire recorder and tested. The audio signal is analyzed using a spectrum analyzer. This invention effectively restores the performance of the magnetic head and improves the quality of the audio signal.

[0070] Optionally, S3 specifically includes:

[0071] S31. When using a voltage detection device to check whether there are voltage fluctuations when the wire recorder is working normally, if voltage fluctuations are found, record the range and frequency of the voltage fluctuations.

[0072] S32. Select an automatic voltage regulator and install it.

[0073] S33. Based on the voltage requirements of the wire recorder, ensure that the output voltage of the automatic voltage regulator is consistent with the design voltage of the wire recorder;

[0074] S34. Start the wire recorder and confirm that the equipment is operating normally and the voltage is stable.

[0075] By using a voltage detection device to check the voltage fluctuations of the wire recorder, recording the fluctuation range and frequency, and installing an automatic voltage regulator to ensure that the output voltage is consistent with the equipment's design voltage, the wire recorder is finally started and the normal operation of the equipment and the voltage is confirmed to be stable. This invention effectively solves the voltage fluctuation problem and ensures the stability of the wire recorder and the quality of the audio signal.

[0076] Optionally, S4 specifically includes:

[0077] S41. Connect the RMEADI-2Pro audio interface to the output of the wire recorder, set the sampling rate to 192kHz and the bit depth to 32bit on the RMEADI-2Pro, and start recording audio signals using the RMEADI-2Pro.

[0078] S42. Open the spectrum analysis tool AudioAnalyzer to receive the recorded audio signal;

[0079] S43. Examine the spectrum to identify distortion and noise;

[0080] S44. Select the Spectrum De-Noise tool and load the noise spectrum data of the blank audio. Set the threshold of the noise reduction tool to determine the frequency range and amplitude of noise cancellation;

[0081] S45. Apply the De-Noise function to automatically remove noise components from the recording.

[0082] By connecting the RMEADI-2Pro audio interface to a wire recorder and recording at a high sampling rate and bit depth, the audio signal is received and analyzed using the spectrum analysis tool AudioAnalyzer to identify distortion and noise. Then, by setting appropriate thresholds and frequency ranges using the spectrum de-noise tool and applying noise reduction functions to remove noise components, this invention effectively improves the clarity of the audio signal and reduces noise interference.

[0083] Optionally, S5 specifically includes:

[0084] S51. Import the audio files from the wire tape recording into the audio processing software iZotopeRX;

[0085] S52. Use the spectrum analysis tool AudioAnalyzer to view the frequency range of the audio and identify the missing frequency bands;

[0086] S53. Start the SpectralRecovery tool, set the frequency range to 5kHz to 15kHz, perform spectrum recovery, and reconstruct the missing high-frequency part;

[0087] S54. Use the MusicRebalance tool to adjust the gain of low, mid, and high frequencies to ensure audio balance and harmony. Monitor and adjust in real time to ensure the naturalness and clarity of the audio.

[0088] S55. Export the processed audio file.

[0089] By importing the audio file from the wire recording into the audio processing software iZotopeRX, using the spectrum analysis tool to view the frequency range of the audio and identify the missing frequency bands, launching the SpectralRecovery tool to recover the high-frequency part from 5kHz to 15kHz, and using the MusicRebalance tool to adjust the low-frequency, mid-frequency, and high-frequency gain of the audio to ensure the balance and harmony of the audio, and finally exporting the processed audio file, this invention effectively restores the high-frequency part of the wire recording, improving the clarity and naturalness of the audio.

[0090] In this embodiment, firstly, the wear problem of mechanical parts was repaired by cleaning, measuring wear, and adjusting tolerances of the spindle and pulley, ensuring stable operation of the equipment. Next, the magnetic head was cleaned using an ultrasonic cleaner, and a metal coating was applied when necessary, restoring the head's performance and improving the quality of the audio signal. Furthermore, the installation of an automatic voltage regulator resolved voltage fluctuations, ensuring voltage stability for the wire recorder and further guaranteeing audio signal stability. In terms of digital audio processing, high-precision recording was performed using the RMEADI-2Pro audio interface, distortion and noise were identified using spectrum analysis tools, and noise reduction was performed using a spectrum de-noise tool, significantly improving audio clarity. Simultaneously, the spectrum recovery and Music Rebalance tools in iZotopeRX software were used to recover the missing high-frequency components of the wire recording tape and adjust the audio frequency balance, ultimately exporting an optimized audio file that effectively enhanced the naturalness and layering of the audio.

[0091] Example 1:

[0092] To verify the feasibility of this invention in practice, it was applied to a historical audio archive restoration project involving an old wire recorder. This wire recorder was used to record early audio data, and due to prolonged use, its sound quality had significantly deteriorated, especially in the high-frequency range. This device was a 30-year-old wire recorder with obvious wear and corrosion on its surface, and the audio signal was filled with noise and distortion. The goal was to restore the audio quality using the optimized method of this invention.

[0093] First, during the actual operation, technicians turned off the wire recorder and disassembled the spindle and pulley components, cleaning the surfaces. Using a micrometer to measure the diameter of the spindle and pulley, they found that the wear depth of the spindle and pulley was 0.15mm, with slight surface indentations. The measurement results indicated that the wear exceeded the original design dimensional tolerances of the equipment. Based on this data, technicians used specialized tools to adjust the tolerances, ensuring that the geometric and dimensional tolerances of the spindle and pulley were restored to the original design range.

[0094] Next, the magnetic head underwent ultrasonic cleaning. During the cleaning process, technicians used an electronic component cleaning solution, immersing the magnetic head in the solution for 30 minutes to ensure that all contaminants and corrosion were thoroughly removed. After cleaning, technicians found slight corrosion on the surface of the magnetic head, so a metal plating treatment was performed. During the electroplating process, an electrolytic method was used to uniformly plate a 10-micron-thickness layer of metal onto the key contact surfaces of the magnetic head, ensuring the uniformity and durability of the metal layer.

[0095] Regarding voltage stability, technicians used voltage detection equipment to check for voltage fluctuations during the operation of the wire recorder. Test results showed that the voltage fluctuation range during operation was 0.8V, exceeding the normal operating voltage range of the wire recorder. Therefore, an automatic voltage regulator was installed to ensure voltage stability and that the output voltage remained within the design requirements. Tests showed that after installing the regulator, the voltage fluctuation decreased to 0.05V, and voltage stability was significantly improved.

[0096] To further improve audio quality, technicians connected the RMEADI-2Pro audio interface to the output of a wire recorder, set the sampling rate to 192kHz and the bit depth to 32bit, and began recording the audio signal. Using the spectrum analysis tool AudioAnalyzer, the technicians identified distortion and noise components in the audio signal and removed these noises using the spectrum de-noising tool and dynamic thresholding technology. After applying noise reduction, the clarity of the audio was significantly improved.

[0097] Finally, in the audio restoration processing stage, the audio file was imported into iZotopeRX. Spectral analysis revealed a significant deficiency in the high-frequency range (above 5kHz) of the wire tape recording. To recover these missing high frequencies, technicians used the SpectralRecovery tool, setting the recovery frequency range to 5kHz–15kHz, and successfully reconstructed the missing high frequencies. Simultaneously, the low-frequency range was extended to 5Hz, resulting in a significant improvement in the overall frequency response. Then, the MusicRebalance tool was used to adjust the low-frequency, mid-frequency, and high-frequency gains, ensuring audio balance and harmony. Finally, the processed audio file was exported.

[0098] After the above optimization process, the tested audio signal showed a significant improvement in quality. Specific data is shown in Table 1.

[0099] Table 1 Comparison of audio quality before and after wire recording optimization

[0100] Audio metrics Before optimization After optimization Frequency response range 50Hz~5kHz 5Hz~15kHz Distortion 30％ 5％ noise interference High noise interference Significantly reduce noise interference voltage fluctuation 0.8V 0.05V Audio clarity lower Significantly improved

[0101] Experimental results demonstrate that the optimized wire recording device achieves significant improvements in multiple audio metrics. Firstly, the frequency response range expands from the original 50Hz–5kHz to 5Hz–15kHz, not only restoring the previously missing high-frequency components but also enhancing the low-frequency range, significantly improving the spatiality and layering of the audio. The distortion rate drops from 30% to only 5%, indicating a substantial improvement in the purity of the processed audio signal and effective control of distortion. Noise interference is also significantly reduced; the previously present high noise interference almost disappears after optimization, resulting in a clearer and more stable audio signal. Voltage fluctuation issues are also completely resolved, with the fluctuation range decreasing from 0.8V to 0.05V, ensuring the stability of the device during operation and further guaranteeing the quality of the audio signal. In summary, the optimization method of this invention significantly improves the audio quality of the wire recorder, and the optimized audio signal more closely resembles the true effect of the original recording.

[0102] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A method for optimizing the digital audio quality of wire recordings, characterized in that, Includes the following steps: S1. Measure the wear of the main shaft and pulley of the wire recorder and adjust the tolerance to the original design range; S2. Clean the magnetic head with ultrasonic waves and re-coat the metal. S3. Control power supply voltage fluctuations by adding a voltage regulator; S4. Combine spectrum analysis tools to analyze audio signals, separate distortion and noise components, and use spectrum de-noise technology and dynamic thresholding for noise reduction. S5. Extend the frequency range through SpectralRecovery technology and use MusicRebalance to perform equalization compensation on the signal.

2. The method for optimizing the digital audio quality of wire recording according to claim 1, characterized in that, S1 specifically includes: S11. Turn off the wire recorder and disassemble the main shaft and pulley components, then clean the surfaces. S12. Use a micrometer to measure the diameter d1 of the spindle and d2 of the pulley to determine the wear area, measure the wear depth in different areas, and check the dimensional tolerances of the spindle and pulley. S13. Inspect the wear pattern on the surface of the spindle and pulley, including dents and cracks, and check the geometric tolerances; S14. The spindle and pulley are worn. Use professional tools to adjust the geometric and dimensional tolerances to the original design range.

3. The method for optimizing the digital audio quality of wire recording according to claim 1, characterized in that, S2 specifically includes: S21. Prepare an ultrasonic cleaner and electronic component cleaning solution. S22. Disassemble the magnetic head and check the surface of the magnetic head for contamination, rust, or other physical damage to determine the parts and extent that need to be cleaned. S23. Place the magnetic head into the cleaning tank of the ultrasonic cleaner, ensuring that the magnetic head is completely immersed in the cleaning solution. Set the cleaning time. After cleaning, remove the magnetic head and gently wipe the surface of the magnetic head with a non-woven cloth to remove any residual cleaning solution. S24. If there is metal wear or corrosion, the metal coating needs to be reapplied. Place the magnetic head in the electroplating tank and use electrolysis to evenly cover the key contact surfaces of the magnetic head with a metal coating. The key contact surfaces are all contact surfaces affected by wear or corrosion. S25. After cleaning and metal coating are completed, the magnetic head is reinstalled on the wire recorder and tested. The audio signal is analyzed using a spectrum analyzer.

4. The method for optimizing the digital audio quality of wire recording according to claim 1, characterized in that, S3 specifically includes: S31. When using a voltage detection device to check whether there are voltage fluctuations when the wire recorder is working normally, if voltage fluctuations are found, record the range and frequency of the voltage fluctuations. S32. Select an automatic voltage regulator and install it. S33. Based on the voltage requirements of the wire recorder, ensure that the output voltage of the automatic voltage regulator is consistent with the design voltage of the wire recorder; S34. Start the wire recorder and confirm that the equipment is operating normally and the voltage is stable.

5. The method for optimizing the digital audio quality of wire recording according to claim 1, characterized in that, S4 specifically includes: S41. Connect the RMEADI-2Pro audio interface to the output of the wire recorder, set the sampling rate to 192kHz and the bit depth to 32bit on the RMEADI-2Pro, and start recording audio signals using the RMEADI-2Pro. S42. Open the spectrum analysis tool AudioAnalyzer to receive the recorded audio signal; S43. Examine the spectrum to identify distortion and noise; S44. Select the Spectrum De-Noise tool and load the noise spectrum data of the blank audio. Set the threshold of the noise reduction tool to determine the frequency range and amplitude of noise cancellation; S45. Apply the De-Noise function to automatically remove noise components from the recording.

6. The method for optimizing the digital audio quality of wire recording according to claim 1, characterized in that, S5 specifically includes: S51. Import the audio files from the wire tape recording into the audio processing software iZotopeRX; S52. Use the spectrum analysis tool AudioAnalyzer to view the frequency range of the audio and identify the missing frequency bands; S53. Start the SpectralRecovery tool, set the frequency range to 5kHz to 15kHz, perform spectrum recovery, and reconstruct the missing high-frequency part; S54. Use the MusicRebalance tool to adjust the gain of low, mid, and high frequencies to ensure audio balance and harmony. Monitor and adjust in real time to ensure the naturalness and clarity of the audio. S55. Export the processed audio file.

Images