Electronic Wind Instrument Sound Synchronization
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Solution Overview
Problem
Electronic wind instruments struggle to accurately replicate the sound emission characteristics of acoustic wind instruments, particularly in transitioning between exhalation sounds and musical notes, due to timing delays and inconsistent volume control.
Innovation Solution
A musical sound generation device incorporating a blowing pressure sensor, key switch, first sound source for exhalation sounds, second sound source for musical notes, and a processor that controls sound volumes based on blowing pressure, ensuring synchronized and volume-adjusted emission of exhalation and musical sounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a noise sound is emitted to replicate exhalation sound in electronic wind instruments, then the sound emission characteristic closer to acoustic wind instruments is achieved, but the timing synchronization and volume control consistency between exhalation sound and musical sound deteriorate
Solution Approach 1:
The exhalation sound is generated in advance when the key switch is operated, before the musical sound is produced. This preliminary action ensures that the exhalation sound is already present and synchronized when the musical sound begins, eliminating timing delays. The processor starts the exhalation sound output immediately upon key switch operation, preparing the sound environment before the actual note is played.
Solution Approach 2:
The processor continuously monitors the blowing pressure detected by the blowing pressure sensor and dynamically adjusts the volume of both exhalation sound and musical sound in real-time. This feedback mechanism ensures consistent volume control between the two sound types, maintaining proportional relationships based on the player's breath pressure throughout the performance.
2Reliability
If separate control of exhalation sound and musical sound volumes is implemented, then the sound emission realism is improved, but the device complexity increases
Solution Approach 1:
The blowing pressure sensor serves multiple functions: it detects the player's breath pressure for controlling musical sound volume and simultaneously provides the same pressure data for controlling exhalation sound volume. This multi-functionality allows separate volume control of both sound types using a single sensor and unified processing logic, avoiding the need for additional sensors or complex control systems while maintaining realistic sound emission characteristics.
Data Source
AI summary
A musical sound generation device including a blowing pressure sensor which detects a blowing pressure, a key switch which specifies a sound pitch of a musical sound, a first sound source which outputs a first signal corresponding to an exhalation sound, a second sound source which outputs a second signal corresponding to the musical sound having the sound pitch specified by the key switch, and a processor which starts output of the first signal by the first sound source on basis of an operation performed on the key switch, starts output of the second signal by the second sound source on basis of the blowing pressure, and controls a sound volume when the exhalation sound resulting from the first signal is emitted and a sound volume when the musical sound resulting from the second signal is emitted, on basis of the blowing pressure.