[alsa-devel] [PATCH] emux midi synthesizer doesn't honor SOFT_PEDAL-release event

maximilian attems max at stro.at
Thu May 8 22:53:36 CEST 2008

When the hardware wavetable synthesizer of an Creative SB Audigy or SB
Live! card (with emu10k chip) receives the MIDI SOFT_PEADAL-press event
(?? 67 127) the appropriate voice is attenuted. Unfortunately when the
pedal is released (event ?? 67 0) the voice does not get it's original
volume again.

The attached patch fixes this problem by analysing the value (0 or 127)
of the midi control event and resetting the effect register in case of a
release event. I'm not 100% sure if the code to reset the register is
correct but at least it works.

Original patch from "Uwe KrÃ#ger" <uwe_debbug at arcor.de>
Submitted to http://bugs.debian.org/474312

Cc: uwe_debbug at arcor.de
Signed-off-by: maximilian attems <max at stro.at>
 sound/synth/emux/emux_synth.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/sound/synth/emux/emux_synth.c b/sound/synth/emux/emux_synth.c
index 478369b..f81e081 100644
--- a/sound/synth/emux/emux_synth.c
+++ b/sound/synth/emux/emux_synth.c
@@ -341,8 +341,12 @@ snd_emux_control(void *p, int type, struct snd_midi_channel *chan)
 		/* FIXME: this is an emulation */
-		snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, -160,
+		if (chan->control[type])
+			snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, -160,
+		else
+			snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, 0,
+				     EMUX_FX_FLAG_OFF);

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