---
title: Sample rate
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/sound_sample_description_version_1/sample_rate
---

# Sample rate

A 32-bit unsigned fixed-point number (16.16) that indicates the rate at which the sound samples were obtained.

## Overview

Overview The integer portion of this number should match the media’s time scale. Many older version 0 files have values of 22254.5454 or 11127.2727, but most files have integer values, such as 44100. Sample rates greater than 2^16 are not supported.

## 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)
- [Compression ID](quicktime-file-format/sound_sample_description_version_1/compression_id.md)
- [Packet size](quicktime-file-format/sound_sample_description_version_1/packet_size.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)