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Messages - Sayman

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1
Hello again. Ok, about BPM and tempo, I seem to have understood and figured it out.
But another question i have: when playing, periods are used. How can these
periods be converted to sample movement? let's say, the note A-4 is encountered,
it has some period. To reproduce the sample at this note (frequency), this
period must be converted to a certain value that will indicate the offset in the
sample.

2
Hello All! I have some 8 bit machine based on Z80 CPU. I try to write MOD player, but confront wirh a problem.
This 8 bit machine not have DMA and not have CIA or similar device. So, i need to work with samples and speed and bpm parameters in realrtime (or with tables). I need to convert BMP and speed to bytes per tick/row. I know about standart formula - speed/(BPM*2), but this is in milliseconds (or in Hz). But, i need to calculate - how many byutes i need to send in sound device per speed tick (or row). Can somebody help me?

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