Exploring Double Notes For Organs, Pianos and Electronic Keyboards - A special supplementary edition teaching how to create two-part harmony by playing "double notes" in the melody
| Country | USA |
| Brand | RHYTHM BAND |
| Manufacturer | Sport Supply Group |
| Binding | Apparel |
| ItemPartNumber | RB36 |
| Model | 36XXXXXX |
| ReleaseDate | 2010-01-27 |
| UPCs | 037728509638 |
| EANs | 0037728509638 |