Electronic music - audio effects
Contents
Noise gate
Compressor
Multiband compressor
Distortion, overdrive, fuzz, etc.
Delays and reverb
Some relevant theory
Flanger, Chorus
Reverb
Echo and Delay
Tape delay
Delay DIY
BDD and Digital delay DIY
DIY Spring reverb
See also
spring reverb tank coding
Physically, tanks are mostly a small voice coil, often two or three somewhat different springs, and a pickup coil (or sometimes piezo).
Impedance-wise, consider that it's basically small speaker and small pickup.
Impedances will vary between types; input between a few Ohms and maybe a kOhm, output a few kOhms. You can tell from the code (accutronics started, most follow).
Codes:
- number: usually one of:
- for Accutronics:
- 1: 9.25" (~23.5cm), 2 springs
- 4: 16.25" (~41.3cm), 2 springs
- 8: 9.25", 3 springs
- 9: 16.25", 3 springs
- for Belton:
- 2: 2 springs
- 3: 3 springs
- for Accutronics:
- letter: input impedance at 1kHz (ranging from 8 Ohm to ~2kOhm)
- A: 8 Ohm for Type 1&4, 10 for Type 8&9
- B: 150 Ohm for Type 1&4, 190 Ohm for Type 8&9
- C: 200 Ohm for Type 1&4, 240 Ohm for Type 8&9
- D: 250 Ohm for Type 1&4, 310 Ohm Ohm for Type 8&9
- E: 600 Ohm for Type 1&4, 800 Ohm for Type 8&9
- F: 1.4 kOhm for Type 1&4, 1.925 kOhm for Type 8&9
- letter: output impedance at 1kHz
- For Accutronics:
- A: 500 Ohms for Type 1&4, 600 Ohms for Type 8&9
- B: 2250 Ohms for Type 1&4, 2575 Ohms for Type 8&9
- C: 10000 Ohms for Type 1&4, 12000 Ohms for Type 8&9
- For Belton:
- A: 500 Ohms for Type 1&4, 600 Ohms for Type 8&9
- B: 2250 Ohms for Type 1&4, 2575 Ohms for Type 8&9
- C: 4000 Ohms for Type 1&4, 4000 Ohms for Type 8&9
- D: 10000 Ohms for Type 1&4, 12000 Ohms for Type 8&9
- For Accutronics:
- number: decay time
- 1: Short, (~1 to 2 sec)
- 2: Medium (~2 to 3 sec)
- 3: Long (~3 to 4 sec)
- letter: grounding/shielding - mainly about ground loops (so buy to match what you're replacing, though various cases are fixable afterwards)
- A: input connected to chassis, output connected to chassis
- B: input connected to chassis, output isolated
- C: input isolated, output connected to chassis
- D: both input and output isolated
- number: travel lock (now rare, meaning it's usually 1)
- letter: mounting plane - basically which side is up
- A = Open Side Up
- B = Open Side Down
- C = Connectors Up
- D = Connectors Down
- E = Input Up
- F = Output Up
- this is mostly about which direction the springs are off-center to avoid hitting things, and best distance to the magnets? (verify)
If replacing one in an amp, you probably want to match the impedance, grounding, and mounting plane.
And size if larger won't fit.
You have some leeway in spring amount and decay and size, if you want to experiment.
See also:
Repurposing a floppy drive as sampler or tape-style delay
Wah-wah
Talk box
A talk box is just a box with a speaker, and a hose that puts that sound in your mouth.
Your mouth effectively makes vowel-like resonances, to be picked up by your vocal mic. Seems to have been mainly used for guitars.
https://en.wikipedia.org/wiki/Talk_box
Bit crusher
Vocoder
Autotune
Phase shifter
Pitch shifter, frequency shifter
Modulation
Modulation alters a signal waveform using a carrier waveform.
https://en.wikibooks.org/wiki/Sound_Synthesis_Theory/Modulation_Synthesis
