#Play .mod files mod
#Play .mod files code
#Play .mod files zip

That 2MB should be more than suitable for holding pretty much any MOD/S3M file of interest, even 512kB-1M should be plenty for most songs.

#Play .mod files code

When I get another chance to play about more I hope to code up something similar but either use SDRAM on P1V boards to hold larger audio samples or use my 1MB/2MB SRAM memory expansion board on the BeMicro MAX10 board for this. Regardless it was cool to hear that classic retro sounding wavetable sample music of the old demoscene coming from a propeller. Although some of that might well be due to my SD card read speed. I got it working however you are right there seems to be some audio quality problems with it compared to listening to a normal player in VLC for example.

#Play .mod files mod

I could not find the reason so far, so looped samples sound a bit bumpy or produce Andy, I know its been ages but I finally had a chance to try out your test MOD file player posted above since I was mucking about with all that I2S audio stuff recently. The SD card should be fresh (fornated) because all the files needs to get consecutive sectors otherwise the sample player will not work correct.Д«ut it anyway not works perfect, there is still a bug with the sample loops.

#Play .mod files zip

Before that you need to extract the other ZIP to a fresh formated SD card. One containes the Spin files which you compile and load with the PropTool. The SD and audio pins can be defined in the CON section, the default setting is for the Activity Board.ДЄttached are 2 ZIP files. 256 kB hub- or external RAM.Д«ecause there seems to be some interest, I took the player part and added a very simple menu via a Terminal (P.S.T. My intension was to make a Tracker and not just a MOD player, but I haven't finished the project because editing on the SD card was too hard. There are some more informations in the RETRONITUS thread, also a screenshot of the Tracker. Also a part of the sample must be played in a loop. The sample player must be able to play 4 samples at the same time and change pitch and volume of every channel. Normally the samples are much shorter, so the whole sample memory is mostly under 250 kB. 31 instruments (single samples) each up to 64 kByte. The pattern data needs 1 kB per pattern, and up to 64 patterns are possible, so you can hold only the current pattern to play in hub memory, the whole song is still on the SD card. There is also another cog for the fast SD card SPI routines, not sure if that also counts. My MOD player plays directly from SD card and uses one Spin cog to play the pattern, and one PASM cog for the sample player.

The link has to go directly to my harddisk, perhaps the NSA can help you with that I think if someone can make it work from SD on a prop that would be a great challenge. I know it has been already been done for AVR chips. The only other way to go is with external RAM which would be simpler but perhaps wouldn't be so interesting or portable. It would be a fun and difficult project which is why I liked it. You need lots of COGs and it's a total real time/resource challenge to get it to fit on P1. It looked very tight but it just may be doable via streaming samples from a fast SDCARD for perhaps a 2-4 channel mod at decent sample rates. It was actually on my todo list to attempt it on one of my projects and I spent some early time investigating mod playing requirements a while back but now I am diverted onto other things like DE0-nanos. This also has been of interest to me over the last year.