sine wave synth

Figure 2 summary

• number box
• message melody
• note number to Hz
• oscillator

MIDI note convertion

Here we have an [osc~] object with its frequency inlet connected to a number that comes via a [mtof] unit. This converts "midi" to "frequency", where a midi note is an integer in the range 0 to 127, and frequency is a value in Hertz between zero and about twelve thousand.

Number box type 2

The number boxes in pd-gui can be used either as display devices or as input devices. Here is shown the type 2 box which can be coloured and has other useful properties. Moving the number by clicking and pushing your mouse up and down sends new values to [mtof]. If you want finer grain control than just integers try holding down the shift key before you click.

Message melody

Some message boxes can be immediately used to compose a melody. This isn't the perfect way to write music, but you can simply add message boxes and click them.

Range

Listen to the output frequency change as you move the number over the whole MIDI scale from 0 to 127. Connect another number box to the output of [mtof] and notice the relationship between key number and pitch is not a simple linear one. Each 12 notes doubles the frequency.

Figure 2: sine-wave-synth

B-sine-wave-synth-play.pd B-sine-wave-synth-play.ogg