Clyp offers an audio processing API that is free to use for non-commercial products. The supported file types are mp3, ogg, m4a, wav, aiff, aif, and 3gpp; mp3 and ogg files are made available after processing. Playlists have a maximum of 20 audio files. This API is REST based, and uses JSON for data exchange.
Thirteen APIs have been added to the ProgrammableWeb directory in categories such as Spreadsheets, Air Travel and Notifications. Highlights include the newly released Microsoft Excel REST API, which is exposed through Microsoft Graph. Here's a rundown of the latest additions.