bl00mbox: channel names

components/bl00mbox/bl00mbox_audio.c

components/bl00mbox/include/bl00mbox_audio.h

components/micropython/usermodule/mp_sys_bl00mbox.c

docs/badge/bl00mbox.rst

python_payload/apps/demo_harmonic/__init__.py

python_payload/apps/demo_melodic/__init__.py

python_payload/apps/otamatone/__init__.py

python_payload/apps/shoegaze/__init__.py

python_payload/apps/simple_drums/__init__.py

python_payload/bl00mbox/_user.py

python_payload/mypystubs/bl00mbox/_user.pyi