In a followup to our previous post, got the following tip from b00Daw:
Pwners of the “A8b” — Atari 8-bit — scene, XXL and other Poles, have made demonstation of the GTIA’s abilities to play music from its normal ‘clicky’ nature. By porting over some Z80 ZX Spectrum routines, the team was able to create a music disk cheekily named “Beep’em All” for the A8b which utilizes the POKEY and GTIA sound chips while still managing display through the ANTIC chip. GTIA “clicker” sounds almost exactly like Speccy’s beeper with this late innovation.
MP3s: