Play tunes in three-part harmony on your ZX80 or ZX81! Based on the extremely versatile AY-3-8910 sound generator chip, the QS Sound Board features complete software control of the frequency and amplitude of three independent output channels as well as an envelope shaper and noise channel.
The QS Sound Board can produce fairly accurate scales over a 5 octave range, from C at 32.7Hz to B at 989Hz with a minimal error of +/-0.5%. Because of the limitations of the power supply, no amplifier or speaker has been fitted to the QS Sound Board. Instead, the three channels have been mixed together and taken to a 3.5mm jack socket via a preset volume control, therefore an external amplifier and speaker are needed. The Radio Shack 277-1008 is recommended.
If you wish to use more than the onboard memory with the QS Sound Board, you will need the QS Motherboard which allows the 16K RAM pack to be used in conjunction with the QS Sound Board and one other board.
The QS Sound Board also features two 8 bit input/output ports taken to a 16 pin i/c socket for easy connection to external control functions via ribbon cable.
The prices for the above products are:
QS Sound Board ................ £28.00 QS Motherboard ................ £13.00 QS Sound Board & Motherboard .. £38.00
Quicksilva are at 95 Upper Brownhill Road, Maybush, Southampton, Hants., England.