mrw wrote: > I suspect that space is not the issue, but processing power may be. > > The Radio's hardware chip does provide for some basic DSP, and it is not > used. There is a preconfigured (closed source) software DSP component in > the Radio's ALSA chain, which is rather betterer than that, and is > probably responsible for the quality of the sound output. > > I have contemplated the idea of implementing a basic 'bass cut' filter > on the hardware chip to quell the occasional sense of "baritone boom" > that I hear. Or perhaps one might want a step/baffle type filter to deal > with being placed close to a wall. But UI becomes an issue, and I am no > audio engineer, so I don't know what curves one might want. > > I did suss out the DSP filtering actually in use: > https://forums.slimdevices.com/showthread.php?111663-Community-Build-Radio-Firmware&p=966771&viewfull=1#post966771 > > Perhaps, one day, it could be reimplemented along the lines you suggest. > I don't have a Boom, but one of its features is, I think, to > automatically extend bass response when volume levels allow. The Radio > clearly owes much to the Boom in its audio design, but that feature was > not included. It might be nice to have. There again, the risk of > overloading the bass driver must increase !
Thanks mrw. I do remember your promising post about the DSP filter coefficients. If processing power in the Radio is the issue, then tweaking those filter coefficients in the hardware seems like a useful alternative. I'm sure the Radio has an admirably flat response curve, but I'm not afraid to admit that I'm not a big fan of a flat response curve in all situations! My own personal preference with most audio devices is to try and cut the mid range a bit compared to the bass and (especially) the high frequency components. I believe this is called the 'Rock Smile' :-) The Boom and the Radio seem to have the same driver units (the bass driver certainly, not sure about the tweeter), but to my ears the Boom can be made to sound a lot better, by boosting the bass a little and the treble a little more. I'm not sure what's involved in using Ghidra, but if a Boom would be any use to you in seeing what's been done in its DSP then I'll happily donate one to the cause - just PM me if you want one of my 'spares awaiting refurbishment'. ------------------------------------------------------------------------ chill's Profile: http://forums.slimdevices.com/member.php?userid=10839 View this thread: http://forums.slimdevices.com/showthread.php?t=113479 _______________________________________________ plugins mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/plugins
