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11.
About impulse responses
Vsound operates by convolving the impulse response from an acoustic violin with an input signal,
normally taken from an electric (silent) violin). However, it is equally possible to use vsound with an
acoustic violin fitted with a bridge pickup. The use of the blender is desirable in this case, since it
allows the player to mix the original (dry) signal with the processed (wet) version, in any proportion.
Obtaining a high-fidelity impulse response from an acoustic violin is a subtle procedure, involving
measurements normally undertaken in an anechoic chamber under strictly controlled conditions.
Signal Wizard Systems offers a violin characterization service to provide our customers with impulse
responses of their favourite acoustic violins. For more details, please contact us through our website:
www.signalwizardsystems.com.
The impulse response files packaged with the system are formatted as encrypted text files and
therefore cannot be used with any other third-party software or system.
If you wish to produce your own impulse response files they must be in stored in WAV (wave) file
format. The WAV file must be single channel, 16-bit or 32-bit using PCM encoding (not floating-point
encoding) and contain 4096 values. The sample rate must be exactly 36 kHz (for technical reasons
relating to the internal operation of the vsound hardware).
If you have IRs in a different format but wish to use them with vsound, contact us and we will convert
them for you, free of charge.
