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Does Jolla support USB DACs? [answered]

asked 2014-01-09 08:58:31 +0200

Luilutin gravatar image

updated 2014-01-09 16:49:41 +0200

eric gravatar image

Question in topic.

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The question has been closed for the following reason "the question is answered, an answer was accepted" by JSEHV
close date 2016-02-01 14:41:09.499682


We should resurrect this discussion considering the Jolla Tablet. USB OTG is listed already. The usb audio support (alsa-utils + snd_usb_audio kernel module) + Settings GUI/developer guidelines (the ability to lock DAC ALSA-wise without interference with pulseaudio will be a huge plus!) may be points for a feature request.

t3hwx9 ( 2014-11-19 22:34:37 +0200 )edit

I have this shinny iDSD nano DAC, which would work well with iPhone 5 and Android KitKat phones. However it doesn't work with Jolla - Why is that? Linux has support for USB soundcard, and all we need is a tool like H-E-N on N900. Can we get one? Also iDSD nano provides power to the phone, so phone should charge rather than supplying power and doing surge!

BTW. N900 allows me to use DAC compatible with USB audio 1.0, but not iDSD nano which is USB audio 2.0. However I know that should be just the case of updated ALSA drivers, which for N900 will never exist, but since Jolla is so Open I expect that to be solved, no?

koolas ( 2014-12-25 18:26:54 +0200 )edit

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answered 2014-01-09 09:46:41 +0200

Andy Branson gravatar image

USB DAC support would require a USB host controller, which the Jolla doesn't have. DACs require too much bandwidth for the i2c bus in the Other Half too. It can stream digital audio over Bluetooth though.

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I had no issue streaming audio from N900 to USB audio class 1.0 DAC. So I expect Jolla to be better, is that expectation wrong - is Jolla not better than N900?

What is the target for Jolla? It sounds like all nice features for N900 are gone, and Jolla tries to be alternative to Android devices. If you look at Moto G for example it has same size as Jolla and similar usability. It supports Android apps nativley though, so +1 for Moto G, and surprisingly it does support USB audio class 1.0 and if I upgrade to KitKat it would probably support USB audio class 2.0. So again how is Jolla better from Moto G?

koolas ( 2014-12-25 18:31:37 +0200 )edit

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Asked: 2014-01-09 08:58:31 +0200

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Last updated: Jan 09 '14