Hackaday4 年
slide whistle
In ridiculous times, it can help to play ridiculous instruments such as the slide whistle to keep your ... the sound hole with a cardboard flap to make the notes more distinct.
Hackaday4 年
Self-Playing Whistle While You Work From Home
In ridiculous times, it can help to play ridiculous instruments such as the slide whistle to keep your ... the sound hole with a cardboard flap to make the notes more distinct.