[Duo2400] Re: Non Apple External CD drives

[Gregg Eshelman]

> > Anyone else using external CD drives and getting
> audio
> > throught the SCSI link?

There may be Mac software that can do Direct Audio
Extraction over the bus cable, but the drive has
to support it. Some drives do not, some drives
limit the extraction speed for audio to 1x. Older
NEC brand CD-ROM drives were notorious for limiting
DAE to 1x or even limiting the data read speed to
1x if the disc contained any "red book" audio tracks,
even if you weren't attempting to copy the audio
tracks.

But even if you can do DAE on that PowerBook, you'll
need tons of storage space because it'll be
uncompressed CD Audio format data which will have to
be converted to some other format like WAV or AU
or AIFF before you can play it. The files will still
be huge.

Compression to MP3 or OGG format is possible on a
PowerMac, but I wouldn't want to wait around for
anything less than a G3 to do the compressing.

It is (barely) possible to play MP3 on a 50Mhz 030 or
the faster 040's but not in realtime unless the
playback conversion rate is set pretty low so it
sounds
horrible. Some version of SoundApp would play MP3
after converting the full file to AIFF but stopping
or pausing would flush the buffer so the whole
song would have to be fully converted again.

I don't think I've ever tried MP3 on the 110Mhz 601
in the Radius 81/110 and I may have tried playing
them on the 200Mhz 604ev in the 7300. Lack of a real
optimized player is the main problem. Were someone
to code an MP3 player in as close to pure assembly
language as can run on a Mac.... ;)

=====
"When you do things right, people won't be sure you've done anything at all."

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