Wave Shape Type

Sawthooth
The program for sawtooth wave generating is shown below. The order of the line that generate the table determines the number of overtones. This number determins the sharpness of the shape of the waveform. The larger the number, the sharper the shape of the waveform. Instead, it takes time to generate the waveform.

from pyo import *

# Boot PYO Server
s = Server().boot()

# Make Sawthooth Table
t = SawTable(order=12).normalize() # ←←←←←

# Ganarate Wave using the Table
a = Osc(table=t, freq=100, mul=0.5).out()

# Display waveshape
sp = Scope(a)
sp.setGain(0.5)
sp.poll(1)

# Display GUI
s.gui(locals())

Square
Modified the line indicated by the arrow.

# Make Square Table
t = SquareTable(order=15).normalize()

Triangle
Modified the line indicated by the arrow. Looking at the waveform, a waveform that looks round for a triangle wave is generated.

# Make Triangle Table
t = TriangleTable(order=12).normalize()

Receiving MIDI

It's easy to use Raw Midi to receive MIDI.

from pyo import *

# List of MIDI Device
pm_list_devices()

# Boot PYO Server
s = Server()

# Specify the ID of the target MIDI device (listed by pm_list_devices ()) 
# in setMidiInputDevice () of the server. ID = 99 opens all connected MIDI devices.
# Before start PYO server, need to connect MIDI device.
s.setMidiInputDevice (99)

# Start PYO Server
s.boot().start()

print("Play with your Midi controllers...")

# Display MIDI device by HEX
def event(status, data1, data2):
    print("%02x %02x %02x" % (status, data1, data2))

# Receive MIDI raw data
scan = RawMidi(event)

# Display GUI
s.gui(locals())

After connecting a MIDI device to your computer, you can run the above program to list the MIDI devices and display the MIDI data.

Sounds by MIDI

This program is to sound by MIDI. To play a keyboard and receives MIDI Note On with Pyo to make a sound. Receive MIDI Note On with a function called Notein. The volume of Note is determined by the property 'velocity', which represents the strength of playing, which the function has. Port seems to be a function that generates portamento, but here it generates a amplitue p to make a sound only when the key is pressed. Also, since the property 'pitch' of Notein represents the frequency(Hz), this property is used as it is as the transmission frequency freq to control the generator Osc.

from pyo import *

# List of MIDI Device
pm_list_devices()

# Boot PYO Server
s = Server()

# Before start PYO server, need to connect MIDI device.
s.setMidiInputDevice(99)　

# Start PYO Server
s.boot().start()

# Receive NoteOns with four polyphonic.
notes = Notein(poly=4, scale=1, mul=1.0) 

# Make Sawthooth Table
t=SawTable(order=12).normalize()

# p =1 when getting NoteOn, p=0 when the key is released.
p = Port(notes['velocity'], .001, 0.01)　

# Generate Tone with frequency and amplitude, mul.
a = Osc(table=t,freq=notes['pitch'], mul=p).out()

sp=Scope(a)
sp.setGain(0.5)
sp.setLength(1.0) # holizintal axis 1sec
sp.poll(1)

s.gui(locals())