Convert a MIDI note number to frequency at signal rate
| signal | A signal representing a MIDI note number value (from 0 to 127). The corresponding frequency is output as a signal. |
| Name | Type | g/s | Description |
|---|---|---|---|
| base | float | Sets the "base frequency" used when calculating frequency values (e.g., A = 440.). The default is 440. |

| Name | Description |
|---|---|
| expr | Evaluate a mathematical expression |
| ftom | Convert frequency to a MIDI note number |
| ftom~ | Convert frequency to MIDI note numbers at signal-rate |
| mtof | Convert a MIDI note number to frequency |
| MSP Tutorial 19: MIDI Synthesizer Control | MSP Tutorial 19: MIDI Synthesizer Control |