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PhilippeBekaert / snd-hdspe

New linux driver and tools for RME HDSPe sound cards and extension modules
GNU General Public License v3.0
51 stars 18 forks source link

Results of testing with RME MADI PCIe (rev d2) #2

Open marksumm opened 2 years ago

marksumm commented 2 years ago

This is just for information: I'm getting the cyclic time stretching effect when streaming audio through your driver. Basically, short sections of the audio data are repeated in succession, like the mirror scene from The Matrix :) It's possible that I needed to configure something on the card, but it's quite difficult now that the controls are removed from alsamixer and there is no panel for hdspeconf yet.

PhilippeBekaert commented 2 years ago

Hi Mark,

Madi control is incomplete at this time indeed. I have a madi card at hand though and plan to work on it in the coming weeks. Stay tuned.

The controls are now on the card interface instead of the mixer interface indeed. It seemed to me that they belong better on the card, but the decision is not final yet.

Thanks for testing nonetheless. Best regards,

Philippe.

Philippe Bekaert Universiteit Hasselt - EDM Wetenschapspark 2, 3590 Diepenbeek, Belgie www.edm.uhasselt.be

Op 31 okt. 2021 om 09:07 heeft Mark Summers @.***> het volgende geschreven:

 This is just for information: I'm getting the cyclic time stretching effect when streaming audio through your driver. Basically, short sections of the audio data are repeated in succession, like the mirror scene from The Matrix :) It's possible that I needed to configure something on the card, but it's quite difficult now that the controls are removed from alsamixer and there is no panel for hdspeconf yet.

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PhilippeBekaert commented 2 years ago

Hi Mark,

MADI support has been completed and works with me in all modes, at least on a tested server. (I am having issues on a laptop using thunderbolt PCIe extension boxes).

Let me know how it works out for you, whenever you feel like.

Best,

Philippe.

marksumm commented 2 years ago

@PhilippeBekaert The new driver is working well here for both input and output. I also appreciate the fact that it doesn't mute all the channels by default.

PhilippeBekaert commented 2 years ago

Thanks for testing and letting me know, Mark! Best, Philippe.

On 19 Dec 2021, at 16:29, Mark Summers @.***> wrote:

@PhilippeBekaert https://github.com/PhilippeBekaert The new driver is working well here for both input and output. I also appreciate the fact that it doesn't mute all the channels by default.

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marksumm commented 2 years ago

I haven't really looked into it, but when I tried to change sample rate to 192, I found that my pulseaudio channels (running through jack) were suddenly offset by 1. The left channel had no audio and the right channel played through the left speaker. It doesn't seem to happen at any other sample rate.

PhilippeBekaert commented 2 years ago

Hi Mark,

The channel order seems to be ok on my system - I cannot reproduce your issue. Can you try again, and give me more details, please?

Thanks and best regards,

Philippe.

Philippe Bekaert Universiteit Hasselt - EDM Wetenschapspark 2, 3590 Diepenbeek, Belgie www.edm.uhasselt.be

Op 9 feb. 2022 om 08:51 heeft Mark Summers @.***> het volgende geschreven:

 I haven't really looked into it, but when I tried to change sample rate to 192, I found that my pulseaudio channels (running through jack) were suddenly offset by 1. The left channel had no audio and the right channel played through the left speaker. It doesn't seem to happen at any other sample rate.

— Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android. You are receiving this because you were mentioned.

marksumm commented 2 years ago

Thanks. After some investigation, I think the RME card is behaving correctly but my converter is a bit confused. At 192, the channel count is reduced to 16 in hdspmixer, as expected. However, the converter shows activity for pulseaudio L on channels 1 and 2 simultaneously, and R is mapped to 3 and 4. Since only 1 and 2 are connected to speakers, the apparent offset behaviour is explained.