if(registerPotValue<512)// if register pot turned CCW
{
// calibrate heterodyne parameters
calibrate_pitch();
calibrate_volume();
// calibrate heterodyne parameters
calibrate_pitch();
calibrate_volume();
initialiseTimer();
initialiseInterrupts();
initialiseTimer();
initialiseInterrupts();
playCalibratingCountdownSound();
calibrate();
}
else// if register turned CW
{
// calibrate midi parameters
midi_calibrate();
};
playCalibratingCountdownSound();
calibrate();
_mode=NORMAL;
HW_LED1_ON;HW_LED2_OFF;
@ -501,11 +511,6 @@ void Application::delay_NOP(unsigned long time) {
voidApplication::midi_setup()
{
EEPROM.get(12,midi_channel);
EEPROM.get(13,midi_bend_range);
EEPROM.get(14,midi_volume_trigger);
// Set MIDI baud rate:
Serial.begin(115200);// Baudrate for midi to serial. Use a serial to midi router http://projectgus.github.com/hairless-midiserial/
//Serial.begin(31250); // Baudrate for real midi. Use din connection https://www.arduino.cc/en/Tutorial/Midi or HIDUINO https://github.com/ddiakopoulos/hiduino
//Serial.begin(31250); // Baudrate for real midi. Use din connection https://www.arduino.cc/en/Tutorial/Midi or HIDUINO https://github.com/ddiakopoulos/hiduino
I tested "Hiduino" and "midi to serial" modes, both are OK.
I tested "Hiduino" and "MIDI to serial" modes, both are OK.
4. Selecting the correct usb port on Tools -> Serial Port
5. Select the correct arduino board from Tools -> Board
@ -45,75 +38,91 @@ Serial communication implemented for program monitoring purpose was removed (Par
If you need to monitor calibration for antenna problem fixing, please use original master branch from
https://github.com/GaudiLabs/OpenTheremin_V3.
Serial port is used to send midi messages now.
Serial port is used to send MIDI messages now.
### How does it works ?
### How does it work ?
PITCH :
It uses first note detected at volume rise to generate a NOTEON.
Then it uses PITCHBEND to reach pitch as long as pitch bend range will do.
Beyond it generates a new NOTEON followed by a NOTEOFF for the previous note (legato).
PITCH ANTENNA (ROD):
It uses first note detected as hand moves away from volume loop antenna to generate a NOTE ON.
Then, it can use PITCH BEND messages (if activated) to reach exact pitch as long as pitch bend range will do.
Beyond, it can generate a new NOTE ON followed by a NOTE OFF for the previous note if legato mode activated.
Pitch bend range can be configured (1, 2, 7, 12 or 24 semitones) to align with synth's maximum capabilities.
One exception is that I desactivated pitch bend in 1 semitone mode because portamento does a better job then.
VOLUME:
It generates VOLUME continuous controler, starting NOTEON and ending NOTE OFF (when playing staccato).
The trigger volume can be configured so as we have some volume at note attack on percussive sounds.
It can also generate selected MIDI Continuous Controler changes (MIDI CC).
CONFIGURATION:
There is two calibration mode:
1. If REGISTER POT turned counter clockwise at entering in calibration mode
-> Runs normal calibration of antennas.
VOLUME ANTENNA (LOOP):
2. If REGISTER POT turned clockwise at entering in calibration mode
-> Records midi settings as per pot position BEFORE entering in calibration mode:
It generates selected MIDI Continuous Controler changes (MIDI CC), starting NOTE ON and ending NOTE OFF (when playing staccato).
VOLUME POT : sets volume trigger level
The volume trigger can be configured so as we have some volume at note attack on percussive sounds.
The volume trigger setting is also used to set sensitivity for velocity (how fast volume loop hand is moving when note is triggered).
Matter of fact, the higher is this setting, less margin we have for volume variation. It is compensated by increase of velocity sensitivity.
PITCH POT : sets pitch bend range (1, 2, 7, 12 or 24 semitones)
Use exactly same pitch bend range on your synth. Maximum setting possible is recomended.
CALIBRATION:
TIMBRE POT : sets Channel. In the absence of graduation, timbre variation may help
(Wave Form 1 low = CH1, WF 1 High = CH2, WF 2 Low = CH3, etc...)
This device runs normal calibration of antennas after pushing button for 3 seconds as per initial project
MUTE BUTTON:
Sends ALL NOTE OFF on selected channel and stay in mute until it's pushed again.
SETTINGS:
AUDIO:
Audio processing from antennas to output jack, including pots, LEDs and button functions, is exactly the same as in open theremin V3.
"Register" pot becomes "Selected Parameter" pot and have 8 positions.
"Timbre" pot becomes "Parameter's Value" and have a variable number of positions depending on selected parameter:
1. Register: 4 positions as in original Open Theremin V3
2. Timbre: 8 positions as in original Open Theremin V3
3. Channel: 16 positions (channel 1 to 16)
4. Rod antenna mode: 4 positions
(Legato off/Pitch Bend off, Legato off/Pitch Bend on, Legato on/Pitch Bend off, Legato on/Pitch Bend on)
### What can I do to get a theremin like glissando?
Select a Parameter and move "Parameter's Value" to change corresponding setting.
Set pitch bend range of the theremin with a high value (12 semitones or 24 semitones).
The picture at https://github.com/MrDham/OpenTheremin_V3_with_MIDI/blob/V2-Project/MIDI%20Open%20Theremin%20V3%20HMI.bmp gives an example of possible HMI: on "Value" pot, red lines have 4 positions, grey lines have 5 positions and yellow lines have 8 positions. On "Parameter" pot you see coloured lines indicating which colour to follow for the "Value" pot.
Set pitch bend range of the synth with the same value
Manipulation of "Rod antenna MIDI CC" and "Loop antenna MIDI CC" is not error proof. MIDI newbies should be advised to change their value in MUTE mode.
Closest to real theremin settings (pitch bend range = 24 semitones):
Volume trigger = 127 (Maximum) won't generate any NOTE ON. It can be used to generate MIDI CC only.
1. Set pots like this: Volume = Min, Pitch = Max, Register = Max, Timbre = Midi channel.
Default configuration is: Register = Lowest Register, Timbre = 1st Waveform, Channel = MIDI Channel 1, Rod antenna mode = Legato on/Pitch Bend on, Pitch bend range = 2 Semitones, Volume trigger = 0, Rod antenna MIDI CC = None, Loop antenna MIDI CC = 7-Volume.
2. Push button for two seconds.
3. Then set pots as for audio (Example : Volume = Mid, Pitch = Mid, Register = Wanted octave, Timbre = any)
4. Play (you can mix synth and audio if you want)
MUTE BUTTON:
Sends ALL NOTE OFF on selected channel and stay in mute until it is pushed again.
AUDIO:
Audio processing from antennas to output jack, including volume and pitch pots, LEDs and button functions, is exactly the same as in open theremin V3. You can play the Audio and the MIDI side by side.
### What can I do to get a theremin like glissando?
Activate picth bend and set pitch bend range of the theremin with a high value (12 semitones or 24 semitones).
Set pitch bend range of the synth with the same value.
### If I do not trigger with the volume hand it also seems to trigger a new tone with the pitch antenna. Guess this is how MIDI works.
Yes, with settings above, if you trigger a note (with volume loop) and go in one direction (with pitch antenna) a new note will be triggered after two octaves.
When legato mode is activated, if you trigger a note (with volume loop) and go in one direction (with pitch antenna) a new note will be triggered at the limit of pitch bend range.
Legato mode is used as a workaround for a limitation of MIDI (max 24 semitones pitch bend). Maybe some synth can perform pitch bend on more that 2 octaves but none of mine does...
This is a limitation of midi. Maybe some synth can perform pitch bend on more that 2 octaves but none of mine does...
### Tweakable parameters (in application.cpp):
Changing this to your taste may require some test and trial.
### Tweak
In the following lines of application.cpp:
"#define VELOCITY_SENS 9" -> How easy it is to reach highest velocity (127). Something betwen 5 and 12.
// Set key follow so as next played note will be at limit of pitch bend range
"#define PLAYER_ACCURACY 0.2" -> Pitch accuracy of player. Tolerance on note center for changing notes when playing legato. From 0 (very accurate players) to 0.5 (may generate note toggling).
The "-0.2" could be changed into another value from "0" to "-0.5" depending on how good you are to reach center of the note that you play. "0" is for very good players. "-0.5" is very permissive and generates note toggling in 1 semitone mode. "-0.2" is the limit where my favourite chromatic tuner's green LED turns off (and it is OK for me).
MrDham
7 years ago
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