rmfc wrote: > I'm trying to use any USB sound card with some DSP processing that > allows a microphone array to capture audio and use in speech recognition > (mostly applied in noisy environments). The best device that I found so > far is AndreaElectronics PureAudio USB-SA but unfortunately it isn't > properly supported in Linux/Alsa. The device is recognized as an USB > Audio device (snd_usb_audio) and I can record audio in Audacity. The > problem is that none of DSP features is explicitly activated in USB > configuration so it works almost like any other microphone. > I then tried Asus Xonar U1 but the problem is the same, no configuration > is done in such devices, so they record audio without enough quality to > be used by a speech recognizer (not enough energy, audio DC components > when software gain is applied in Sound Preferences...). Neither of these device has a DSP; any processing is done in software in the Windows driver. Regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
