MorphOS on Power Mac G5

[stefcep2]

Old news. Already OCS Amigas could mix Audio with GFX Blitter. ;-)

Anyone know why Paula samples can be played in >28 khz IF a dblscan screenmode is used? I use to rip CD audio and play it back on an '040  A1200 @ 44.1 khz, @ 14 bit-sounded brilliant.

[stefcep2]

Audio HW can process 16bits at a time per horizontal tick (per channel). With PAL and NTSC modes the horizontal frequency is 15,75 kHz. Since the sampledata is 8bit it means 2 samples are processed. This gives the theoretical limit of around 30kHz.

DBLScan modes double (roughly) the horizontal frequency, and thus also the limit for the audio playback frequency.

Thanks Piru!