bcdaus wrote: > My HiFiBerry DAC arrived today and I wasted no time in connecting it up. > Issue is that I get no audio output. What is the recommended way of > setting it up. I tried scanning for USB devices but it does not show. > What parameters should I pass or will it just auto-magically be found on > the Pi ? > Using v1.10 which worked fine under analogue out via headphone socket > before I mounted the DAC board. > > Thanks, > Bill
Piotrus has given you the answer to your problem but, just to be clear, HiFiBerry is not a USB add-on so it won't appear on the list of USB devices. In fact that is it's claimed strength: the sound signal doesn't need to be converted to a USB signal, passed to an external DAC where the signal is converted back to PCM and fed to a DAC chip. Instead the sound data stream is transferred direct from the Raspberry Pi processor to a DAC chip on the HiFiBerry. This is known as Integrated-Inter-chip Sound, often written as I2S. If you want to learn more take a look at http://en.wikipedia.org/wiki/I%C2%B2S. I won't enter into the argument about whether the differences of a direct transfer are noticeable or not. The main claimed advantage is reduced "jitter" which can be caused in a conventional external USB DAC set-up by having to transfer the sound data stream using several different clocks eg, processor clock, USB clock, DAC clock. That said, all external DACs will buffer incoming data and re-clock it so whether jitter has a real effect is moot. For me the greatest attraction of the HiFiBerry is that it offers a relatively low-cost high-quality all-in-one solution. Richard ------------------------------------------------------------------------ Reeshar's Profile: http://forums.slimdevices.com/member.php?userid=35996 View this thread: http://forums.slimdevices.com/showthread.php?t=97803 _______________________________________________ unix mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/unix
