Generator Class

Generator class

This class represents a single generator.

Properties

generatorType

An enum, see below.

console.log(generator.generatorType); // 48 - initial attenuation

generatorValue

The generator's value, can be negative.

console.log(generator.generatorValue); // -10

All generator types

Below are all defined generator types as of soundfont 2.04.

Important

Generator 48 (Initial Attenuation) applies a 0.04 multiplier instead of 0.1 multiplier like in the spec. Every soundfont synth does this to remain compatible unfortunately.

Generator ID	Generator Name	Minimum Value	Maximum Value	Default Value	Description
0	Start Address Offset	0	32768	0	Sample control - moves sample start point
1	End Address Offset	-32768	32768	0	Sample control - moves sample end point
2	Start Loop Address Offset	-32768	32768	0	Loop control - moves loop start point
3	End Loop Address Offset	-32768	32768	0	Loop control - moves loop end point
4	Start Address Coarse Offset	0	32768	0	Sample control - moves sample start point in 32767 increments
5	Modulation LFO to Pitch	-12000	12000	0	Pitch modulation - Modulation LFO pitch modulation in cents
6	Vibrato LFO to Pitch	-12000	12000	0	Pitch modulation - Vibrato LFO pitch modulation in cents
7	Modulation Envelope to Pitch	-12000	12000	0	Pitch modulation - Modulation envelope pitch modulation in cents
8	Initial Filter Cutoff	1500	13500	13500	Filter - Lowpass filter cutoff in cents
9	Initial Filter Resonance	0	960	0	Filter - Lowpass filter resonance
10	Modulation LFO to Filter Cutoff	-12000	12000	0	Filter modulation - Modulation LFO lowpass filter cutoff in cents
11	Modulation Envelope to Filter Cutoff	-12000	12000	0	Filter modulation - Modulation envelope lowpass filter cutoff in cents
12	End Address Coarse Offset	-32768	32768	0	Sample control - Moves sample end point in 32767 increments
13	Modulation LFO to Volume	-960	960	0	Modulation LFO - Volume (tremolo), where 100 = 10dB
14	Unused 1	-	-	-	Unused
15	Chorus Effects Send	0	1000	0	Effect send - How much is sent to chorus
16	Reverb Effects Send	0	1000	0	Effect send - How much is sent to reverb
17	Pan	-500	500	0	Panning - Where -500 = left, 0 = center, 500 = right
18	Unused 2	-	-	-	Unused
19	Unused 3	-	-	-	Unused
20	Unused 4	-	-	-	Unused
21	Delay Modulation LFO	-12000	5000	-12000	Mod LFO - Delay for Mod LFO to start from zero (weird scale)
22	Frequency Modulation LFO	-16000	4500	0	Mod LFO - Frequency of Mod LFO, 0 = 8.176Hz, unit: f => 1200log2(f/8.176)
23	Delay Vibrato LFO	-12000	5000	-12000	Vibrato LFO - Delay for vibrato LFO to start from zero (weird scale)
24	Frequency Vibrato LFO	-16000	4500	0	Vibrato LFO - Frequency of Vibrato LFO, 0 = 8.176Hz, unit: f => 1200log2(f/8.176)
25	Delay Modulation Envelope	-12000	5000	-12000	Mod Envelope - 0 = 1s delay till Mod Envelope starts
26	Attack Modulation Envelope	-12000	8000	-12000	Mod Envelope - Attack of Mod Envelope
27	Hold Modulation Envelope	-12000	5000	-12000	Mod Envelope - Hold of Mod Envelope
28	Decay Modulation Envelope	-12000	8000	-12000	Mod Envelope - Decay of Mod Envelope
29	Sustain Modulation Envelope	0	1000	0	Mod Envelope - Sustain of Mod Envelope
30	Release Modulation Envelope	-12000	8000	-12000	Mod Envelope - Release of Mod Envelope
31	Key Number to Modulation Envelope Hold	-1200	1200	0	Mod Envelope - Also modulating Mod Envelope hold with key number
32	Key Number to Modulation Envelope Decay	-1200	1200	0	Mod Envelope - Also modulating Mod Envelope decay with key number
33	Delay Volume Envelope	-12000	5000	-12000	Volume Envelope - Delay of envelope from zero (weird scale)
34	Attack Volume Envelope	-12000	8000	-12000	Volume Envelope - Attack of envelope
35	Hold Volume Envelope	-12000	5000	-12000	Volume Envelope - Hold of envelope
36	Decay Volume Envelope	-12000	8000	-12000	Volume Envelope - Decay of envelope
37	Sustain Volume Envelope	0	1440	0	Volume Envelope - Sustain of envelope
38	Release Volume Envelope	-7200	8000	-12000	Volume Envelope - Release of envelope (prevents clicks)
39	Key Number to Volume Envelope Hold	-1200	1200	0	Volume Envelope - Key number to volume envelope hold
40	Key Number to Volume Envelope Decay	-1200	1200	0	Volume Envelope - Key number to volume envelope decay
41	Instrument	-	-	-	Zone - Instrument index to use for preset zone
42	Reserved 1	-	-	-	Reserved
43	Key Range	-	-	-	Zone - Key range for which preset / instrument zone is active
44	Velocity Range	-	-	-	Zone - Velocity range for which preset / instrument zone is active
45	Start Loop Address Coarse Offset	-32768	32768	0	Sample control - Moves sample loop start point in 32767 increments
46	Key Number	-1	127	-1	Zone - Instrument only: Always use this MIDI number (ignore what's pressed)
47	Velocity	-1	127	-1	Zone - Instrument only: Always use this velocity (ignore what's pressed)
48	Initial Attenuation	-250	1440	0	Zone - Allows turning down the volume, 250 = -10dB
49	Reserved 2	-	-	-	Reserved
50	End Loop Address Coarse Offset	-32768	32768	0	Sample control - Moves sample loop end point in 32767 increments
51	Coarse Tune	-120	120	0	Tune - Pitch offset in semitones
52	Fine Tune	-99	99	0	Tune - Pitch offset in cents
53	Sample ID	-	-	-	Sample - Instrument zone only: Which sample to use
54	Sample Modes	0	3	0	Sample - 0 = no loop, 1 = loop, 2 = reserved, 3 = loop and play till end in release phase
55	Reserved 3	-	-	-	Reserved
56	Scale Tuning	0	1200	100	Sample - The degree to which MIDI key number influences pitch, 100 = default
57	Exclusive Class	0	99999	0	Sample - Cut = choke group
58	Overriding Root Key	-1	127	-1	Sample - Can override the sample's original pitch
59	Unused 5	-	-	-	Unused
60	End Marker	-	-	-	End marker