32-bit/384kHz M2Tech hiFace DAC & Galaxy Note II:
Galaxy Note II using USB Audio Recorder PRO > digital USB audio out >> USB OTG cable adapter >> hiFace DAC
High resolution sound on an Android Tablet? Yes we can!
"We recently did some experiments with an Asus Nexus 7 tablet using Android and some of M2Tech products. Thanks to an app called USB Audio Recorder Pro which, as the name suggests, is mainly a recorder but also offers some playback features, our engineer Pietro succeeded in playing back 192kHz tracks via both the hiFace Two and the hiFace DAC.
But what's more interesting is that, once a Joplin ADC was connected to the tablet, he was able to record up to 384kHz! This give more than a chance to people who want to make highest quality field recordings during concert or sessions: they only need a small and cheap tablet, a Joplin and a pair of microphones with a cheap phantom supply unit (ande, hopefully, a hiFace DAC to monitor the recording). Thanks to the excess gain available on the Joplin, no real mike preamp is necessary.
The special point is that no USB Audio Class 2.0 compliant driver was available on the tablet: the experiment succeeded thanks to a feature of the app: it includes a user space driver emulator, that is a piece of software which exclusively interfaces to the audio peripheral (this means that no other app can use this feature to in turn access the peripheral) without any need for kernel recompiling. This means that every tablet running Android 2.2, provided with a 2.0 USB port, can use hiFace Two, hiFace DAC and Joplin.
The app can be found on www.audio-evolution.com
. It's not free, but I think that 5.49€ may be worth the pain (I have no interest in the company selling the product, nor am I paid to advertise the product)."