Newton Developer Technical Information: Newton Programmer's Guide: 2.1 OS Addendum /

Chapter 7 - Sound

About Sound

The sound interface has been improved in the Newton 2.1 OS with a number of enhancements. The most notable include:

• support for sound recording in *protoSoundChannel, with appropriate sound input hardware
• new objects to support sound recording: *soundRecorder and *protoRecorderView
• a new sound frame object, *protoSoundFrame
• support for 16-bit sound samples, which are generated by the MessagePad 2000 and eMate 300 sound recording hardware
• support for recording and playback of compressed sounds via codecs (compressor-decompressors); built-in codecs include muLaw, IMA, GSM, and a synthesizer codec for sound generation

---

Subtopics

Terminology

Compatibility

Hardware Volume Support

User Interface

Sound Input

Sound Compression

Synthesized Sound

Devices and Channels

Sampling Rates

New NTK Sound Import Function