Tiptop Z-DSP - Manual (Page 17)

Program Switching.
The Z-DSP cartridges can contain up to 8 programs,
each program being a set of mathematical algorithms
that manipulate digital data. As mentioned above, the
ADC brings an analog signal into the digital domain by
capturing it repeatedly thus creating a sample.
The DSP allows for various operations to be applied to
a sample. It can be multiplied by some constant
number (providing gain or loss), added to another
sample (mixing), stored in memory and read out at a
later time (delay), and many other functions. By using
combinations of these operations, we can create
effects, filters (such as tone controls), compressors,
limiters, and other audio processes.
The DSP will execute the same set of algorithms on
each incoming sample, producing one sample out for
every sample in. The algorithm is a list of
mathematical operations to produce the desired
result, and one or more algorithms constitute a
program. These programs are downloaded to the
processor where the processor will continuously
execute the algorithms on the sample stream.
The Z-DSP allows you to load programs from a
cartridge by either manually pressing the yellow button
or by feeding it a pulse or voltage for automated
control. The Z-DSP has a built in sequential switch that
allows the user to switch programs forward (1.2.3...7.8)
or in reverse (8.7...3.2.1) etc. A trigger or gate signal
sent to the TRIGGER input will switch to the next higher
program (wrapping from 8 to 1). If a gate signal is
applied to the FWD/REV