Fons Adriaensen <fons@xxxxxxxxxxxxxx> a écrit : > Resampling means 'computing samples for another sample rate', and not > 'changing the sample format'. I thought that the sample format was the sample depth plus the sample rate, but sample format and sample depth are the same. Definitions are important. > Neat trick, but if it works you are just lucky. Gee. I just finished my script, and it works. > ** There is no defined order when Jack provides a list of ports. ** What?? Now... Heinseberg law applying to Jack... :-) > In most cases, Jack will list them in the order they were created, > but you can't count on that. I might just count on that. I like being lucky. :-) > The only way to obtain a defined order is by interpreting the port > names, which is what e.g. Qjackctl does: it does a lexicographical > sort. Which is why it will show Ambdec's ports as 0w, 1x, 1y, 1z. > AFAIK, mplayer doesn't do that. Isn't Qjackctl just a wrapper (or controller) for jackd? Qjackctl shows the ports in a different (lexicographical) order, but the order does not change when starting jackd with Qjackctl. > > Now my problem is to connect mplayer to a second instance of > > ambdec; I'll try to use the aloop devices instead of mangling the channels order with a bash script to create a remapping string for Mplayer. I should be able to script the connections between the ambdec decoders and the aloop devices, in order to use MPlayer with ALSA instead of Jack. > I need it for lower frequencies, and since I use a triangle > > (for basic horizontal decoding), I had to change the lower limit > > for the number of allowed channels in the source code of ambdec. > > There's no need to do that, just set the matrix coefficients for the > 4th channel to zero. Nice! I'll fix my triangle decoder; it's cheaper than replacing all my satellite speakers with full-range speakers, only for frequencies below 120Hz. > When Ambdec gets extended to 4th degree (order) and > higher, it will also use ACN in the port names - there are > no FuMA names for those. The only alternative would be to > use port names that explicitly contain L and M. I doubt I'll be using 4th degree anytime soon (my listening room is very small), but there might be a need to create a new amb format using the ACN ordering instead of the FuMA ordering. Or does it already exists? -- Marc _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
