# 16113: Voice Recording: Cannot download a dual-channel presentation of a mono recording

Log Type: APPLICATION

Log Level: WARNING

## Description

This warning appears when you request a dual-channel media file for a recording that was stored as `mono`. Twilio can return a dual-channel download only when the original recording has two channels available.

### Possible causes

* The recording was created with `recordingChannels=mono` on an API call, or with `channels="mono"` when you started the recording with `<Start><Recording>`.
* The recording was created with `<Record>`, which stores the audio as a mono recording.
* The download request included `RequestedChannels=2` for a recording that has only one channel available.

### Possible solutions

* Retry the download without specifying a channel count. If you need to set it explicitly, retry with `RequestedChannels=1`.
* Review the recording's channel configuration before downloading media. Use the `RecordingChannels` value from `RecordingStatusCallback` to determine whether to request one channel or two.
* If you need separate tracks for future recordings, create the recording in dual-channel format by setting `recordingChannels=dual` on the Call resource or `channels="dual"` on `<Start><Recording>`.

#### Additional resources

* [Recordings resource](/docs/voice/api/recording)
* [TwiML Voice: `<Recording>`](/docs/voice/twiml/recording)
* [TwiML Voice: `<Record>`](/docs/voice/twiml/record)