Uploaded April 2023 | Updated September 2026, 1 week ago
Super rare keyboard. It appears to be a rebranded SIEL (similar to Suzuki Keyman 49/61). It was made in Italy. The digital preset voices are very similar to the SIEL MK-610. The digital rhythms, accompaniments and arpeggios have similar patterns to the MK-610. But, the drum sounds are even more lo-fi and not as crisp. Although it has two speakers, it sounds mono.
Super rare keyboard. It appears to be a rebranded SIEL (similar to Suzuki Keyman 49/61). It was made in Italy. The digital preset voices are very similar to the SIEL MK-610. The digital rhythms, accompaniments and arpeggios have similar patterns to the MK-610. But, the drum sounds are even more lo-fi and not as crisp. Although it has two speakers, it sounds mono.
![1970 MATTEL Optigan Program Disc: Big Top Marching Band (4/4) [70163]](https://i.ytimg.com/vi/wrqq8LKqYRY/mqdefault.jpg "1970 MATTEL Optigan Program Disc: Big Top Marching Band (4/4) [70163]
Sounds from Optigan Music Maker. Get the Optigan app to hear better samples and it works just like the real thing. You can even play the virtual discs upside-down (backwards). Or, get them at optigan.com.")
