Porting an Arduino speech synthesis project to the Raspberry Pi Pico (coding tutorial)

In this video I am porting an Arduino project "Cantarino demo - Daisy Bell" to the Raspberry Pi Pico.
You will find "speech_daisybell.pde " on https://code.google.com/archive/p/tin... uploaded on Jul 15, 2009
This tutorial may show you how to convert other "original" Arduino projects to the Raspberry Pi Pico.
I found a video showing the original code executed on the Arduino equipped with the ATMEGA328:    • Arduino singing "Daisy Bell"  

I could imagine that I could try to create my own algorithm in future.

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Intro: (0:00)
Prepare the Arduino project: (1:05)
Remove AVR code: (2:35)
Modify the ISR routine: (3:03)
Add the audio processing basis: (4:13)
Use of the second core: (10:42)
Start to compile: (11:50)
Fixing the compiler errors: (12:10)
Fixing the enum: (12:55)
Complete the ML_SynthTools integration: (16:38)
Fixing the side effects: (17:23)
Verification successful: (19:33)
Upload: (19:43)
Sound demo: (19:58)