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VM420E1 is a voice grade sound board which can play up to 128 different messages. It is totally
self-contained and requires only a power supply, a speaker and a few trigger signals to operate. VM420E1 has eight EPROM sockets and can store up to 34 minutes of audio in 32Kbps voice quality.
Desired messages are
pre-programmed into non-volatile EPROM chips by using sound development system VP880 (for digitization) and standard EPROM programmer (for programming). Sampling rates from 24 to 64 Kbps are available for different sound
quality vs. memory cost tradeoffs. Playback can be triggered by applying a 7-bit binary code and a strobe signal to the board’s input port which is directly compatible with most microprocessors and microcontrollers. The
built-in power amplifier can deliver up to 1W into a speaker, with adjustable volume control.
VM420E1 is suitable for voice grade applications that do not require frequent message change or user recordability. For
applications requiring higher sound quality or more flexible controls, please use QuikWave sound boards instead.
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