Hello,

I tried with a regular stereo system with two speakers very close together and got bass, which seems wrong.

Then, i also tried on my project wher I use a TDA1543 as dac and the sound was not good, like with an echo.

TDA1543 outputs sound to a Differential mono amplifier.

So for the time being I came back to my original setting with mono, one channel output to one input of the TDA1543 and Single ended output to the mono amplifier.

/# Send alsa API to jconvolver
pcm.rawjack {
type jack
playback_ports {
0 jconvolver:in.L
# 1 jconvolver:in.R
}
capture_ports {
0 system:Output_L
1 system:Output_R
}
}
# jackplug
pcm.jack {
type plug
slave { pcm "rawjack" }
hint {
description "JACK Audio Connection Kit"
}

}

# use following peripherical by defaut with alsa:

pcm.!default {
type plug
slave { pcm "rawjack" }
slave.channels 2
ttable.0.0 0.6
ttable.1.0 0.6
ttable.0.1 0
ttable.1.1 0
}

2016-03-10 12:48 GMT+01:00 Ralf Mardorf [via Linux Audio] <[hidden email]>:

On Thu, 10 Mar 2016 13:13:14 +0100, Gerhard Zintel wrote:
>On Thursday 10 March 2016, Clemens Ladisch wrote:
>> Can you look at the output with an oscilloscope?
>Or record with the input of another sound card / computer and look at
>it in e.g. Audacity?

Or simply play a sinus tone and mix the tone and the out of phase tone
to mono by a mixer or move two speakers face to face, one playing the
tone, the other the out of phase tone.
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Cordialement,

Jean