---
title: Compression ID
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/sound_sample_description_version_1/compression_id
---

# Compression ID

A 16-bit integer.

## Overview

Overview Set to 0 for version 0 sound descriptions. This may be set to –2 for some version 1 sound descriptions; see the Redefined sample tables section in Sound sample description version 1 ('stsd').

## See Also

### Data fields

- [Sample description size](quicktime-file-format/sound_sample_description_version_1/sample_description_size.md)
- [Data format](quicktime-file-format/sound_sample_description_version_1/data_format.md)
- [Reserved](quicktime-file-format/sound_sample_description_version_1/reserved.md)
- [Data reference index](quicktime-file-format/sound_sample_description_version_1/data_reference_index.md)
- [Version](quicktime-file-format/sound_sample_description_version_1/version.md)
- [Revision level](quicktime-file-format/sound_sample_description_version_1/revision_level.md)
- [Vendor](quicktime-file-format/sound_sample_description_version_1/vendor.md)
- [Number of channels](quicktime-file-format/sound_sample_description_version_1/number_of_channels.md)
- [Sample size](quicktime-file-format/sound_sample_description_version_1/sample_size.md)
- [Packet size](quicktime-file-format/sound_sample_description_version_1/packet_size.md)
- [Sample rate](quicktime-file-format/sound_sample_description_version_1/sample_rate.md)
- [Samples per packet](quicktime-file-format/sound_sample_description_version_1/samples_per_packet.md)
- [Bytes per packet](quicktime-file-format/sound_sample_description_version_1/bytes_per_packet.md)
- [Bytes per frame](quicktime-file-format/sound_sample_description_version_1/bytes_per_frame.md)
- [Bytes per sample](quicktime-file-format/sound_sample_description_version_1/bytes_per_sample.md)