XMOS USB - I2S Adapter

R101

I am new to all this and have just set up a B+ with v0.3-beta.

It all works well until I connect my USB DAC, which uses an XMOS based USB to I2S adapter. Rune just keeps reporting that the sound card configuration has changed and cycles the volume between 0 and 100, but does nothing else. The adapter works OK under Ubuntu. Is the Rune kernel UAC2 compliant, or am I wasting my time?

An alternative would be to use the Pi's I2S output in slave mode. Are there any instructions on how to do this in Rune?

hondagx35

Hi R101,

sounds like you have a power supply issue.

I would try to use a powered usb hub if available.

An alternative would be to use the Pi's I2S output in slave mode.

You have to enable I2S on the settings page first.
Select HifiBerry DAC as output and connect your DAC.

Frank

R101

Thanks for the reply, hondagx35.

The USB adapter is locally powered, so I don't think it's likely to be a power problem. It is showing that kind of behaviour, though, so I will check.

None of the I2S choices are labelled as slave mode, but perhaps one is?. So far as I know, the kernel still has to be recompiled to alter the clock direction, which is not something I could do without a lot of help.

hondagx35

Hi R101,

the latest image for RP2 and RP3 have support for the HiFiBerry Digi (all versions) and the DAC+ Pro.
These two DACs make use of the slave mode (DAC is clock master).
So check their driver source code how this is done.

Which Pi do you use?

Frank

R101

Hi hondagx35,

I am using a B+ but as a result of your post I will be ordering a Pi3 right now!

Thanks.

R101

To update this, the Pi 3 works perfectly with my USB card.