OKT vs MOD: Amiga 8-Channel Oktalyzer vs Standard 4-Channel ProTracker
Technical breakdown of Amiga music tracker formats: compare Oktalyzer 8-channel CPU software mixing against standard 4-channel DMA Paula MOD files.
Oktalyzer (.okt) doubled the Amiga's native channel count by implementing 8-channel software mixing in real time, whereas standard ProTracker (.mod) modules used 4 hardware DMA audio channels directly mapped to the Paula chip.
| FEATURE | OKT | MOD |
|---|---|---|
| Channel Count | 8 channels (4 pairs mixed) | 4 channels |
| Playback Mechanism | Software CPU Mixing + DMA | Hardware DMA Direct |
| Platform | Commodore Amiga | Amiga, PC, Atari |
| Sample Depth | 8-bit Signed PCM | 8-bit Signed PCM |
| Container Format | IFF-style Chunk Stream | Fixed Byte Offset Structure |
- Supports 8 simultaneous polyphonic audio channels on stock Amiga hardware
- Rich chords, layered percussion, and complex counterpoint melodies
- Uses compact IFF chunk structure with customizable channel modes
- High historical significance in the Amiga demo and chiptune scenes
- Universal tracker software compatibility and ubiquitous player support
- Zero CPU mixing overhead due to direct hardware DMA playback
- Simpler 4-channel pattern layout supported across all tracker platforms
- Standardized effect command syntax across dozens of trackers
Use MOD for maximum retro player compatibility. Use OKT when exploring vintage 8-channel Amiga chiptunes. convrtr synthesizes both formats offline into modern 16-bit 44.1kHz stereo WAV audio.
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