You might have a little look at the Rockbox project - it's a mature FOSS replacement OS for personal music players. It won't (yet) do exactly what you're asking, but I'm be fairly sure that one or two people will have suggested such a direction on the forums over the years. On 7 January 2013 22:13, Len Ovens <len@xxxxxxxxxxxxx> wrote: > > On Mon, January 7, 2013 9:42 am, Johannes Kroll wrote: >> On Sun, 6 Jan 2013 08:48:35 -0800 >> "Len Ovens" <len@xxxxxxxxxxxxx> wrote: > >>> As for hacking the unit itself, the first question is why. Not so much >>> why >>> you want to, but why would others want to. Before something gets the >>> firm/software hacked there generally needs to be a reason at least a few >>> people want to do so. Some extra functionality that is obvious (the >>> smart >>> phone has so much locked functionality it is frustrating so there are >>> lots >>> of hacks). The dr already seems to me to anything I would think of using >>> it for, >> >> As to why, I can think of a few things: >> >> - triggering recording at fixed time intervals, or based on some audio >> event like raised volume, or based on some external event, e. g. for >> syncing to a video camera >> - implementing USB audio so the device can be used as an external >> microphone. The recorders I've seen only output an analog signal. >> - changing recording parameters like custom sampling rates or different >> encodings. Commercial ones mostly do uncompressed WAV or MP3, but no >> lossless compression like FLAC for example. >> >> Other people probably have other ideas... > > I was not trying to say it shouldn't be hacked, just that there needs to > be a large enough group of people who also see a need (or a why) for > hacking it before there is much support (so that you are not doing the > whole thing on your own). Those are all good reasons you have above (none > of which I had thought of) I am sure more would show up out of need too. > >> Last not least, I simply like the idea of being in control of hardware >> I buy. > > Nothing wrong with that. > >> As to price: the DSO nano is a free/open source oscilloscope which >> isn't expensive at all, so building free and inexpensive hardware is >> possible. Actually, using the DSO nano as a base could be a good >> start for a recorder, it has A/D converters, mass storage and >> everything... Just no mics. > > It could be a good base, but I think you may wish to add an A/d converter > with more than 4bit sample depth (at least it looks like to me) and single > channel. The sample rate is fine (though not fixed but variable so I don't > know how easy to set to 48k or whatever), but takes lots of CPU as the cpu > becomes part of the codec. However, there are lots of unused pins (i/o > ports) on the cpu and it is open so the possibility of adding something is > there. There is a schematic in the manual on > http://www.seeedstudio.com/depot/micro-digital-storage-oscilloscopedso-nano-p-512.html > for download which is where I got my info. > > It has a display, buttons, battery, USB port, etc. I might be tempted to > add a second USB port (host instead of client) and use one of the cheap > USB audio ports (parts all in the USB plug) and some $5 mics. I just found > a great site for DIY mics That has some better pres than what comes with > the little electrets. (its on my other computer :P ) > > > -- > Len Ovens > www.OvenWerks.net > > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/listinfo/linux-audio-user _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
