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Messages - jimee

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11
Bug Report Archive / Re: "beeeeeep" bug
« on: April 16, 2008, 21:55:47 »
About the beep... This is due to the way Amiga soundchip plays "non-loops". I already posted about how this hardware works:
http://modarchive.org/forums/index.php?topic=833.msg3528#msg3528

If you want to make your MODs rendered normally on Protracker, just add a little (2 bytes are enough) silence at the beginning of your non-looped-samples.

12
Bug Report Archive / Re: saving as MOD problem
« on: August 09, 2007, 10:25:11 »
I confirm that the 68k (hehe, amiga forever!) has a 16 bits data bus, and an address bus that can only manage even addresses. Odd addresses are accessed by using a special pin of the 68k. All other chips (sound, video) can only use even addresses. So, in MOD format, samplelen loopstart and looplen are always even values. And to get confused a little, these values are written without the last 0 bit! (That means, the values are divided by 2).

A little word about amiga loops: if loopstart=0, the sample is played entierely before starting the loop. That is a special "feature" because the amiga sound processor cant disable loop. Samples with no loop are identified by loopstart=0, looplen=2, and sampledata starting with 2 null bytes. If you dont start the sampledata with 2 null bytes, amiga will play an awful acute sound at the end of the sample.

13
MilkyTracker Tracks & Songs / Re: MilkyTracker audio quality
« on: July 28, 2007, 09:17:34 »
Did you try without interpolation? Interpolation is a mathematical operation which acts as a low-pass filter. It could (on least cases) cut freqs above Samplerate/4.

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