On Thursday 22 April 2004 11:33, Erik de Castro Lopo wrote: > On Thu, 22 Apr 2004 11:04:40 +0100 > Joe Button <linux-audio-user@xxxxxxxxxxxxxxx> wrote: > > 1) Probably a long shot, but does anyone have any clue as to how I might > > convert the files from the BR-532's internal format to WAV or whatever? ... > > Cursory Googling hasn't revealed a lot about the file formats to me - > > they're described as 'MT2', 'LV1', and 'LV2' (in decreasing order of > > sound quality). > I'm the author of libsndfile. If you can make available a small example > file (100kbytes or less) I'll be willing to have a look. It might also be > useful to suply the same file decoded to WAV just for comparison. If you can reverse-engineer it from the files I'll be extremely grateful and impressed, but frankly a bit surprised. What's on the SM cards looks pretty opaque. I think this sort of thing is why RMS started the free software movement in the first place. If you're up for having a look, I've recorded a short (a few seconds) jazzy noodle onto a virgin card and uploaded the card's contents wholesale to http://joebutton.co.uk/br532card.tgz. Sorry it's rather bigger than you wanted - I just recorded a very short snippet but it turned out to be bigger than I'd hoped (578k). There are three tracks: Track 1: Me hitting a mug with a teaspoon (the mug's blue and says 'Elvis lives' on it if you're interested) - 6.68 seconds Track 2: Acoustic rhythm guitar - 8.26 seconds Track 3: Acoustic jazz guitar noodling - 7.85 seconds Unfortunately the tracks don't show up as separate files on the card data. Presumably they're buried in take_dat.br0. I've included the tracks as wavs along with the raw card data. The Windows prog that converts from the BR532 format to wavs is here, if it's any help: http://www.roland.co.uk/SUPPORT/UPDATES/BR532wav.ZIP If there's anything else you'd like let me know, although I'm going away for a week or so today so it'll be a while before I can do much else. Maybe Thorsten will be able to help (he seems like a helpful kind of guy). As I said, if you can figure this stuff out I'll be enormously grateful, but if not don't sweat it. Ta, Joe x
