Hi Ralf,

> I'm fine with the quality of DAT, 48KHz 16-bit, but I've no experience
> with recording using Linux. 44.1KHz 16-bit seems to be not fine while
> producing with Linux.

Your sound card can do better. Check the messages window in Jack 
Control, because Jack will try 32-bit I/O first, then if that fails, 
fall back to 24-bit, and if that fails, finally try 16-bit. As for 
sample rate, it's practical to record at 96KHz if you have the disc 
space, but depending on the material you're recording, you may not hear 
a big improvement over 48KHz.

> And how can I convert the mastering to CD quality

I strongly recommend that you reduce and dither to 16-bit at the very 
last stage in the mastering process, rather than at any point before. 
You can do this by connecting your Jack application to Jamin, then 
bit-reducing and dithering the audio returned from Jamin. If you bit 
reduce before sending the audio to Jamin, then all those extra bits will 
be wasted, because you'll be doing DSP on the 16-bit audio.

The way I do this is to create a bus in Ardour called 'jamin return'. 
The Ardour session for mastering is made up of 32-bit stereo mixes, one 
per track, which have been exported from earlier Ardour multitrack 
sessions. In the mastering session, the stereo output of Ardour's master 
bus is connected to Jamin's inputs, and the outputs of Jamin are 
connected to the inputs of Ardour's 'jamin return' bus, as well as the 
hardware output for the studio monitors. That way, I get to listen to 
Jamin's output via the 24-bit hardware of the sound card.

When I choose Export in Ardour, I export a wav file only from the 'jamin 
return' bus, which is reduced to 16-bit with a shaped noise dither, 
ready for burning to CD in Gnome CD Master. See Quentin's tutorial at:

http://www.64studio.com/manual/audio/ardour/cdmarkers

Cheers!

Daniel

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