Linux AudioEngine testers - Linux only
(2013-01-17, 10:40)uNiversal Wrote: @nickr

Er it may go through the cable, but its not digital when it gets there IIRC the internal DAC Digital to Analog Converter gets to another external DAC as it left the original device.

uNi

What internal dac?
(2013-01-17, 14:36)8rnity Wrote: my ampli just has a basic dac internal in same case based on CM102-A+/102S+ Audio Controller that is a single chip dac used most in usb speakers, that has a decent audiophile grade too. it handles 16 bit stereo 44/48K via USB and of course it converts in analogue signal the streaming provided via USB.

dac output is analogic (electrical) and the 2-ch are soldered internally to one of the two line-inputs (the other is RCA and is on the back, there's a switch on front to select wich line-input you want), so I have a pc, an USB cable that connects pc with internal dac of my amplifier, and out of dac it's all done in analogic domain. of course I have a volume knob to regulate the volume of the ampli also (valve pre-amplifier stage).

in xbmc the device is detected as USB speakers and of course I disabled DTS, AC3 passthrough etc.
I feed it with ALAC CDrip files that should be converted in PCM before streaming to external dac via usb.

using XBMCuntu I launched dmix, shouldn't be all at 100% (master volume and board volume) to keep signal untouched?

everything works well with windows wasapi, 100% volume, and foobar as source, even with windows xbmc signal levels are correct and no clipping or distorsion at all (worst than foobar but this is OT).

here some cut of log:

21:31:37 T:139902788302592 DEBUG: NEWADDON PythonCallbackHandler construction with PyThreadState 0x7f3da0000920
21:31:39 T:139905032124224 DEBUG: Previous line repeats 15 times.
21:31:39 T:139905032124224 DEBUG: Joystick 0 button 1 Down
21:31:39 T:139904843585280 DEBUG: CSoftAE::Run - Sink restart flagged
21:31:39 T:139904843585280 INFO: CSoftAE::InternalOpenSink - sink incompatible, re-starting
21:31:39 T:139904843585280 INFO: CAESinkALSA::Initialize - Attempting to open device "@:CARD=Device,DEV=0"
21:31:39 T:139904843585280 INFO: CAESinkALSA::Initialize - Opened device "front:CARD=Device,DEV=0"
21:31:39 T:139904843585280 INFO: CAESinkALSA::InitializeHW - Your hardware does not support AE_FMT_FLOAT, trying other formats
21:31:39 T:139904843585280 INFO: CAESinkALSA::InitializeHW - Using data format AE_FMT_S16NE
21:31:39 T:139904843585280 DEBUG: CAESinkALSA::InitializeHW - Request: periodSize 512, periods 16, bufferSize 8192
21:31:39 T:139904843585280 DEBUG: CAESinkALSA::InitializeHW - Got: periodSize 512, periods 16, bufferSize 8192
21:31:39 T:139904843585280 DEBUG: CAESinkALSA::InitializeHW - Setting timeout to 186 ms
21:31:39 T:139904843585280 DEBUG: CSoftAE::InternalOpenSink - ALSA Initialized:
21:31:39 T:139904843585280 DEBUG: Output Device : USB Sound Device
21:31:39 T:139904843585280 DEBUG: Sample Rate : 44100
21:31:39 T:139904843585280 DEBUG: Sample Format : AE_FMT_S16NE
21:31:39 T:139904843585280 DEBUG: Channel Count : 2
21:31:39 T:139904843585280 DEBUG: Channel Layout: FL,FR
21:31:39 T:139904843585280 DEBUG: Frames : 512
21:31:39 T:139904843585280 DEBUG: Frame Samples : 1024
21:31:39 T:139904843585280 DEBUG: Frame Size : 4
21:31:39 T:139904843585280 DEBUG: CSoftAE::InternalOpenSink - Using speaker layout: 2.0
21:31:39 T:139904843585280 DEBUG: CSoftAE::InternalOpenSink - Internal Buffer Size: 4096
21:31:39 T:139904843585280 DEBUG: AERemap: Downmix normalization is enabled
21:31:39 T:139904843585280 DEBUG: CSoftAEStream::CSoftAEStream - Converting from AE_FMT_S16NE to AE_FMT_FLOAT

Please post the entire log to pastebin
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Messages In This Thread
Almost there, but still no HD - by OkvOkv - 2012-04-17, 03:54
AudioEngine testers - Linux only - by Ritzie - 2012-05-12, 18:36
Re: RE: AudioEngine testers - Linux only - by nickr - 2013-01-17, 19:51
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