Setup pc for bitperfect music driver#ī- Using ASIO driver and S/PDIF synchro: SuccessĢ- Recording a professional S/PDIF (aka AES/EBU) PCM signal played from the Audiophile 192 itself Here is a concrete example: playing the sequence 2 samples were sometimes added to the signal, and samples around were kind of stretched. The problem encountered here seems to be jitter.The PCM signal was played from another computer using foobar with kernel streaming plugin.Ī- Using WDM driver and internal synchro: Failure Setup pc for bitperfect music software#This limitation was hit using several recording software (Sonar, GoldWave, Audacity).ġ- Recording a consumer S/PDIF PCM signal Setup pc for bitperfect music drivers#WDM drivers can't be used to record while synchronizing on the S/PDIF clock, and on the opposite, ASIO drivers can't record while synchronizing on the internal clock. īefore entering test details, I found a limitation in the M-Audio drivers concerning clock synchro. 1 file containing silence during 30 minutes.1 file containing a non-null constant value during 30 minutes.1 file containing all possible values taken on 24 bits samples.I used several 192kHz 24bits files to be recorded (I also used the same files when previously testing ASUS Xonar D2/PM): I will just relate the PCM recording through its S/PDIF input. It is possible to select the clock synchro method, either internal or S/PDIF input signal. It is also a PCI sound card with S/PDIF input/output, support for Asio and WDM drivers. I have just tested the M-Audio Audiophile 192 sound card. But that was a decade ago and patches have been around since not long after.Īdditionally, kernel-streaming mode WDM drivers, which bypassed the KMixer, were considerably more capable and better performing. There was a bug in the K-mixer (aka, KMixer apparently affecting those with Win ME and Win 2000) that did truncate to 16 bits. And it apparently wasn't when this 2003 explainer was written: So it is still uclear if it's only a gain change or if there is more involved.I think your info on WDM is not complete or up to date. That SHOULD have yielded 24 bit transfer.Īnd it will mask any padded bits because a gain change will redistribute the non-padded bits across all the available bits if the gain change is not a power of 2. So there are more issues to consider when using WDM drivers. So even if the soundcard drivers would provide for 24 bits, windows will fall back to 16 bits if there is a 16 bit source present anywhere in the chain. I read somewhere that if the windows mixer is used somehow, it will automaticly truncate everything to 16 bits if there is a 16 bit stream comming in. That's realy strange as there definitely SHOULD be padding if you record a 16 or 20 bit stream at 24 bits.Īltho almost any gain change at the recording side would overwrite the padded bits. You also should have noticed that we are dealing with deterministic test signals here, not music. Setup pc for bitperfect music how to#I don't think Muriel is trying to show off as an expert, he's just asking perfectly valid and reasonable questions.Maybe tell us how to BECOME an expert if it's not by trying hardly. It is clear that Muriel has done his homework and has had enough theoretical background to start learning by doing. In fact I believe it's the only way to understand things. In what way are you trying to create music?Why are you questioning this? IMO it is perfectly legitimate to try to understand things by experimenting with whatever you have at hand. When you understand what should happen and under what circumstances you will be able to make it happen with out all the try anything and see what happens routine. Take the time to do a little bit of reading. I dont know why you are trying so hard to be an expert when you are clearly not. You seem to have very little experience and your equipment is lower than entry level from what I have read.
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