AMCOG Games’ Tony Bartram has released an updated beta [zip] version of his Wavebox-inspired synthesiser module, RDSP. The module provides modern RISC OS computer systems with the means to both synthesise sounds, and play back sound samples with various effects applied to them.
The latest version – the second beta release – adds support for modulating samples via BASIC’s ENVELOPE command, support for sample looping (which means a simple drum loop, for example, can be made to play indefinitely), increases the number of channels to sixteen, and much more. For more details, refer to Tony’s post on the RISC OS Open forum, and to the documentation within the zip file.