PD Voice Changer

Complete Command List

System Commands

CommandParametersDescriptionhelp or ?-Display help screeninfo<topic>Show detailed information about a specific topicstatus-Display current status of all effects and settingspresets-List all available presetsreset-Reset all effects to default valuesdebugon/offEnable/disable debug mode

Audio Settings

CommandParametersDescriptionmicgain<0.1-10>Set microphone preamplifier gain (default: 1.0)volume<0-1>Set master output volume (default: 0.5)bitshift<0-24> or autoSet microphone bit shift manually or auto-detectchannel-Show current microphone channelchannelleft/right/autoSet microphone channel or auto-detect

Preset Management

CommandParametersDescriptionpreset<1-24>Load a preset by numbersavepreset<1-10>Save current settings to user preset slotloadpreset<1-10>Load a user preseteditpreset<1-10>Interactive preset editorexportpreset<number>Export preset as JSONimportpreset-Start preset import modedone-Complete preset import

Operating Modes

CommandParametersDescriptionmonitoron/offClean monitoring mode (only noise gate and EQ active)bypasson/offComplete bypass mode (raw audio passthrough)

Test Modes

CommandParametersDescriptiontest auto-Automatic channel and bit shift detection (~10 seconds)test mic-Manual microphone testing modetest tone-Generate 440Hz test tonetest passthrough-Direct microphone to speaker connectiontest stop-Exit test mode

Test Mode Controls

• In test mic mode:
  • + / - : Adjust bit shift
  • l / r : Switch between left/right channel
  • save : Save current settings
• In test tone mode:
  • v / V : Increase/decrease volume

Hardware Controls

CommandParametersDescriptionbutton show-Display current button assignmentsbutton<1-5> preset <n>Assign preset to hardware buttonled mode<0-7>Set LED mode (see LED modes below)led bright<20-255>Set LED brightness

LED Modes

• 0 = Off
• 1 = C-3PO Gold
• 2 = Warm White
• 3 = Red Alert
• 4 = Blue Tech
• 5 = Alternating
• 6 = Flicker
• 7 = Voice Sync

Audio Effects

Bitcrusher (Digital/Robot Effect)

CommandParametersDescriptionbitcrusheron/offEnable/disable bitcrusher effectbitdepth<1-16>Set bit depth (lower = more distorted)

Chorus (Voice Doubling)

CommandParametersDescriptionchoruson/offEnable/disable chorus effectchorusdepth<0-100>Set chorus depth in percent

Vibrato (Pitch Modulation)

CommandParametersDescriptionvibratoon/offEnable/disable vibrato effectvibratodepth<0-0.01>Set vibrato depth

Static Noise Generator

CommandParametersDescriptionstaticon/offEnable/disable static noisestaticlevel<0-1>Set static noise levelstaticfreq<low> <high>Set frequency band (Hz)

Tremolo (Volume Modulation)

CommandParametersDescriptiontremoloon/offEnable/disable tremolo effecttremolodepth<0-1>Set tremolo depthtremolorate<0.1-20>Set tremolo rate in Hz

Ring Modulator (Dalek/Metallic)

CommandParametersDescriptionringmodon/offEnable/disable ring modulatorringmodfreq<20-500>Set carrier frequency in Hz

Sweep Filter (Auto-Wah)

CommandParametersDescriptionsweepon/offEnable/disable sweep filtersweepdepth<0-1>Set sweep depthsweeprate<0.1-10>Set sweep rate in Hz

Formant Shift (Pitch without Speed)

CommandParametersDescriptionformanton/offEnable/disable formant shifterformantshift<0.5-2>Set shift ratio (<1 = deeper, >1 = higher)

Phaser (Swirling Effect)

CommandParametersDescriptionphaseron/offEnable/disable phaserphaserrate<0.1-10>Set phaser rate in Hzphaserdepth<0-1>Set phaser depth

Delay/Echo

CommandParametersDescriptiondelayon/offEnable/disable delay effectdelaytime<0-1000>Set delay time in millisecondsdelayfeedback<0-0.95>Set feedback amountdelaymix<0-1>Set wet/dry mix

Noise Gate

CommandParametersDescriptionnoisegateon/offEnable/disable noise gategatethreshold<-60-0>Set threshold in dB

3-Band Equalizer

CommandParametersDescriptioneqon/offEnable/disable equalizereqlow<-20-20>Set low frequency gain in dBeqmid<-20-20>Set mid frequency gain in dBeqhigh<-20-20>Set high frequency gain in dB

Filter Bank

CommandParametersDescriptionfilter add<type> <freq> <q> [gain]Add a filter (max 4)filter clear-Remove all filters

Filter types:

• lowcut (highpass)
• highcut (lowpass)
• bandpass
• peak
• lowshelf
• highshelf

Preset List

Character Presets (1-14)

1. Darth Vader – Deep, mechanical breathing
2. Kylo Ren – Dark with static interference
3. Stormtrooper – Radio communication effect
4. R2-D2 – Beeps and whistles
5. C-3PO – Metallic protocol droid
6. BB-8 – Modern droid sounds
7. Chewbacca – Deep growling voice
8. General Grievous – Mechanical coughing
9. Boba Fett – Helmet communication
10. Jabba the Hutt – Deep, slow voice
11. Emperor Palpatine – Evil, raspy voice
12. Ewok – High-pitched creature
13. Yoda – Wise, aged voice
14. Dalek – Classic Doctor Who robot

User Presets (15-24)

• Slots 15-24 are available for custom user presets

Usage Examples

Basic Setup

test auto              # Auto-configure microphone
preset 1              # Load Darth Vader voice
volume 0.7            # Set output to 70%

Manual Configuration

channel right         # Use right microphone channel
bitshift 8           # Set bit shift to 8
micgain 1.5          # Increase microphone gain

Creating Custom Voice

reset                # Start with clean slate
formant on           # Enable formant shifter
formantshift 0.7     # Make voice deeper
ringmod on           # Add metallic effect
ringmodfreq 30       # Classic robot frequency
savepreset 1         # Save to user slot 1

Testing Audio

test mic             # Enter microphone test
+                    # Increase bit shift
r                    # Switch to right channel
save                 # Save settings
test stop            # Exit test mode

Button Programming

button show          # See current assignments
button 1 preset 4    # Set button 1 to R2-D2
button 2 preset 1    # Set button 2 to Darth Vader

Tips and Tricks

1. First Time Setup: Always run test auto first to configure your microphone automatically.
2. Finding Your Channel: If no audio, try channel right – many INMP441 modules default to the right channel.
3. Adjusting Input Level: Use micgain to boost quiet microphones or reduce loud ones.
4. Creating Voices: Start with a character preset, then modify individual effects to create unique voices.
5. Monitoring: Use monitor on to hear your voice cleanly while adjusting microphone settings.
6. LED Feedback: Set led mode 7 for voice-activated LED effects.
7. Quick Preset Access: Program your favorite presets to buttons for instant access during use.