snarlydwarf;210112 Wrote: > A quick look at the source makes it seem that 'transporter' as the 3rd > value will work. > > (Despite what the comments in convert.conf say.)
Thank you Snarlydwarf. I have done some testing, and basically it works! The high noise floor I noticed when streaming my 96 KHz Linn Records flac files to my SB3 - is now gone. Using the new sox I mentioned earlier, the rules I placed into convert.conf to make this happen are: flac wav * * [flac] -dcs --skip=$START$ --until=$END$ -- $FILE$ | [sox] -t wav - -t wav -2 - filter 0-24000 flac flac * * [flac] -dcs --skip=$START$ --until=$END$ -- $FILE$ | [sox] -t wav - -t wav - filter 0-24000 | [flac] -cs --totally-silent --compression-level-0 - It was necessary to cut the bit-depth in the flac to wav rule to 16 bits - I could not stream a WAVE file with 24 bit samples to my SB3: hence the -2 option. I did not add the sox dithering effect in this test, but that can be done if deemed necessary, along with the filtering and sample-size reduction. Regardless, the 96 KHz tracks I played sounded good. The flac to flac rule works better with a full 24 bits streaming through, and the noise is gone. I believe the filter is using a window size of 128 samples, and it is consuming about 20% of the cpu resources on my laptop:) It works well enough that I am going to experiment dropping the window length to 64 samples - that might still be sufficient, and would cut the cpu usage in half to carry out this function. Three problems with this solution: 1. When a track starts playing, there is a noticeable pop/snap that comes through. I don't know why sox is doing that, and possibly it can be suppressed - I have not figured out how to accomplish that yet. 2. Of course, a user loses the ability to scan forward and backwards in a track. Personally, #2 does not bother me, but #1 does. -Ron -- Ron F. *Squeezebox setup:* wireless SB3 -> CI Audio VDA.2 DAC + VAC.1 PSU *Main rig:* NAD 7600 + NAD 2600A -> Phase Tech PC-6.5 speakers *Headphone rig:* Headroom Max -> Sennheiser 650s *Music Server:* Nano-ITX computer running SlimCD + 750 GByte HDD -> Netgear wireless router *Other stuff:* NAD C542 CDP, NAD 6300 Tape, Monster 5100 Power conditioner, Outlaw Audio cables ------------------------------------------------------------------------ Ron F.'s Profile: http://forums.slimdevices.com/member.php?userid=5616 View this thread: http://forums.slimdevices.com/showthread.php?t=36240 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
