maximum sampling rate during playback WITHOUT AY

ZXNet echo conference «code.zx»

From TomCaT To All 22 September 2006

Hello Titus 2Titus: The frequency will be 44, I have already recalculated the new option. But you give me hope. Today I will write a small WAV converter (to digitize I'll have to do it all on IBM :( ) and I'll check...

From Kirill Frolov To All 22 September 2006

Hello TomCaT Tom> subject, in general Tom> recalculation of clock cycles gives: Tom> 37*8-5+14+15+12=332 -- i.e. so many clock cycles per 8 bits of output Tom> 3.5*1000/332*8=84.33Khz - right? or got it wrong? Key words -- pulse width modulation, ADPCM. There is no time to chew from the primer. Read CODE.ZX (archives).

From TomCaT To All 22 September 2006

Hello fk0 Do you mean that this packaging format needs to be applied here? or what? A talking about the primer is completely in vain. It just takes away the desire altogether study.

From TomCaT To All 22 September 2006

Hello TomCaT This player doesn't work for some reason. According to calculations, it should last half a second and at least sound something. Actually it clicks and exits... :( yeah, at the end jr nz,... here is an example archive. There is a 30-byte player and a service program in Delphi for converting wav files into player format. For storing and playing many files the player, of course, needs to be slightly adjusted - the loop exits there when it reaches end of RAM... And it takes about a second and a half tracks. Total floppy disk - 100 seconds :) For the task that I wanted to do, the sound occupies one track. In ADPCM, Of course, less, but when unpacking the playback frequency will drop. Or for one-bit sound is it less important?.. What is the maximum frequency at reasonable savings in storing reproduced bits (i.e., not one bit per byte)? File: kitplay.zip http://zx.pk.ru/attachment.php?attachmentid=3836

From van Yu Shinn To All 22 September 2006

Hello TomCaT fk0> Read CODE.ZX (archives). Where?

From TomCaT To All 23 September 2006

Hello, captain cobalt That's it. For some reason I didn’t even want to find out... :)