First burn with resampling ....

Geoff_Wood wrote on 11/5/2002, 8:09 PM
Did my first CDA5 project with on-the-fly resampling (48K to 44K1)at 8x.

Unfortunately I was unable (buffer underrun) to burn this directly, and had to pre-render, a serious drag in my mind.... CDA5b(73), Celeron 533, 512MB, Win98SE.

Was I overambitious expecting this to work, and if so, what performance can we anticipate in the final version wrt dx processing versus burning speeds ?

Comments

SonyDennis wrote on 11/5/2002, 10:49 PM
Which resampling quality? "Best," for example, uses a 25-pole filter, and at 8x, it's expected to do this to 700,000 samples per second. Resampling is not cheap, by any means. Dithering is easier, but still adds a measurable overhead to rendering. Sure, I'd like to have both, but if I could only have one, I would rather have quality of resampling over (no rendering) burn speed.

The CDA4 render engine was unbelievably optimized to keep up with burn speeds of the day, but was limited in what it could do. While CPU speeds have grown, so have burn speeds, and the CDA5 engine does *much* more for you.

///d@
Geoff_Wood wrote on 11/5/2002, 11:57 PM
Ummm. Yeah. Was the default.

geoff
Geoff_Wood wrote on 11/6/2002, 9:29 PM
... the default being '?' Where do you see/change this ?

Subsequently had success 'OTF' at 4 x , 16 bit 48K source media this post, then assume it went OK !

Aha, now finished - it went OK. But not at 8x.
Geoff_Wood wrote on 11/6/2002, 9:38 PM
Ahaaa. Applied the 'help search fix' and found the setting. Default is 'Good'. Will next try 6x with 'Best' next.
Geoff_Wood wrote on 11/7/2002, 2:30 AM
Naaa. Both at 6x and 4x on 'Best' resampling the buffer slowly empties and under-runs at around 10% of the 72 m disc....
sreams wrote on 11/10/2002, 6:23 PM
Resampling is an intensive process if you want quality from it. There's no way around that.