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[RFC] Using Sustain Pedal like Soft Pedal #1276

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[RFC] Using Sustain Pedal like Soft Pedal #1276

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45e7d34
Try implementing sustain stuff
derselbst Aug 31, 2023
dc0b391
Apply suggestions from code review
derselbst Nov 19, 2023
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28 changes: 27 additions & 1 deletion src/synth/fluid_voice.c
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Original file line number Diff line number Diff line change
Expand Up @@ -321,6 +321,7 @@ fluid_voice_init(fluid_voice_t *voice, fluid_sample_t *sample,
voice->mod_count = 0;
voice->start_time = start_time;
voice->has_noteoff = 0;
voice->note_off_sustain= 0;
UPDATE_RVOICE0(fluid_rvoice_reset);

/*
Expand Down Expand Up @@ -612,6 +613,24 @@ fluid_voice_calculate_runtime_synthesis_parameters(fluid_voice_t *voice)
int dest_gen_index = mod->dest;
fluid_gen_t *dest_gen = &voice->gen[dest_gen_index];
dest_gen->mod += modval;

// Issue #1276: Using Sustain Pedal like Soft Pedal
//
// If a modulator is in use that responds
// to the CC64 and intends to manipulate the release envelope,
// It's voice should change the volume envelope during the sustain fase.
// to allow the modulator to achieve the desired behavior
// it uses this modulator amount in new decay value and set attenuation,
// creating smooth release.
//

if(mod->src1 == SUSTAIN_SWITCH &&
(mod->flags1 & FLUID_MOD_CC) &&
mod->dest == GEN_VOLENVRELEASE)
{
voice->note_off_sustain = mod->amount;
}

/* fluid_dump_modulator(mod); */
}

Expand Down Expand Up @@ -1366,7 +1385,14 @@ fluid_voice_noteoff(fluid_voice_t *voice)
/* Or sustain a note under Sustain pedal */
else if(fluid_channel_sustained(channel))
{
voice->status = FLUID_VOICE_SUSTAINED;
voice->status = FLUID_VOICE_SUSTAINED;
// Here it changes the envelope to simulate ignore_sustain
if(voice->note_off_sustain)
{
fluid_voice_gen_set(voice, GEN_VOLENVDECAY, voice->note_off_sustain);
fluid_voice_gen_set(voice, GEN_VOLENVSUSTAIN, 960);
fluid_voice_update_param(voice, GEN_VOLENVSUSTAIN);
}
}
/* Or force the voice to release stage */
else
Expand Down
1 change: 1 addition & 0 deletions src/synth/fluid_voice.h
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Expand Up @@ -105,6 +105,7 @@ struct _fluid_voice_t
/* rvoice control */
fluid_rvoice_t *rvoice;
fluid_rvoice_t *overflow_rvoice; /* Used temporarily and only in overflow situations */
double note_off_sustain; /* for create smooth sustain #1276 */
char can_access_rvoice; /* False if rvoice is being rendered in separate thread */
char can_access_overflow_rvoice; /* False if overflow_rvoice is being rendered in separate thread */
char has_noteoff; /* Flag set when noteoff has been sent */
Expand Down