[ALSA] emux midi synthesizer doesn't honor SOFT_PEDAL-release event

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.

Boolean MIDI controls should interpret 0..63 as false and 64..127 as true.
Thanks to Clemens Ladisch for review and correction.

Original patch from "Uwe Kraeger" <uwe_debbug@arcor.de>
Submitted to http://bugs.debian.org/474312

Signed-off-by: maximilian attems <max@stro.at>
Cc: uwe_debbug@arcor.de
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/synth/emux/emux_synth.c b/sound/synth/emux/emux_synth.c
index 478369bb38c34118701f08966c0cf2b96f2beab4..b343818dbb964ae3137b7e90c08284ffa03e92c6 100644 (file)
--- 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)
        case MIDI_CTL_SOFT_PEDAL:
 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
                /* FIXME: this is an emulation */
-               snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, -160,
+               if (chan->control[type] >= 64)
+                       snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, -160,
                                     EMUX_FX_FLAG_ADD);
+               else
+                       snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, 0,
+                                    EMUX_FX_FLAG_OFF);
 #endif
                break;