For the moment forgetting about the Xover's, how would I use ecasound or another tool to implement an arbitrary EQ function with sliders / user controls? I've got JACK now running better (mainly a problem related to configuration) and I'd like to have maybe a dozen or more bands of very LF EQ (eg, fc: 5hz, 8hz, 12hz,.... 100hz) for subsonic equalization.
So far it appears brutefir can do this but sans a GUI? What plugin would I need and is it extensible?
should I start a new topic to discuss the IIR based EQ you hinted about?
Thank you very much,
Ronan
On 1/24/07, Sergei Steshenko <steshenko_sergei@xxxxxxx> wrote:
On Wed, 24 Jan 2007 15:53:53 -0800
"ronan mcallister" <bass.woofer@xxxxxxxxx> wrote:
> Sergei,
>
> I am not familiar enough with what I need to say I must have Jack. In fact,
> I can playback a simple WAV file by "ecasound -i songmept1.wav -o:alsahw"
> just fine. I think my Alsa system is OK, I was thinking I'd need Jack to
> allow me to impement signal processing using tools like bruteFIR, Jamin,
> etc.
>
> Should I be able to configure a basic active crossover (lowpass and high
> pass) and perhaps a parametric EQ without Jack?
>
> Let's say for a simple test I want to take my WAV, play it back with
> ecasound, route it to BruteFIR (or some other tool ) and implement a xover
> with separate high pass and low pass outputs driving external amplifiers.
> I've currently got the Intel ICH7 multi-channel HD sound card, although of
> course I realize this wont' be a good solution for much more than a simple
> test, should this inbuilt capability work for my simple test sans jack?
>
> Very sorry for my rank amateurish level of Linux audio knowledge and thanks
> for your help.
>
> Rgds,
> ronan
>
First of all, I'm not sure you really need bruteFIR.
I have very good headphones and I've played a lot with equalizers.
If I suppress just one band in 1/6 octave equalizer I barely hear
the difference - I do not think my ears have that bad hearing.
So, I think, a decent equalizer should be quite sufficient for your
equalization tasks, and bruteFIR is apparently an overkill.
Also, the more fine equalization you try to achieve, the more dependent
on your head location in the sound fields you become - remember about
standing waves, etc.
I did myself do equalization with ecasound without jack.
That's because:
1) ecasound can input sound from ALSA;
2) ecasound can output sound to ALSA;
3) ecasosund is able to insert a LADSPA plugin on the way, and the latter
can be the one doing equalization.
Regards,
Sergei.
P.S. I think I've already recommended to buy a cheap old well supported
card like SB128 - es1371 driver - just to debug non-ALSA related issues,
like mixing, routing, equalization, latency.
I myself very much liked M-Audio Revolution 7.1, and people are
saying there is a much cheaper Chaintech one (something like AV710,
don't remember exactly) which has quite comparable to M-Audio Revolution 7.1
quality.
--
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