# Enable Stereo-separated Recording

Cloud Voice can capture the incoming (RX) and outgoing (TX) audio of a one-on-one call as two distinct tracks and write them to the left and right channels of a single stereo file. Because each party lands on its own channel, the recording is far easier to review, transcribe, or feed into downstream processing tools. This page walks through turning the feature on.

## Before you begin

Your Cloud Voice system must be running firmware `84.20.0.74` or later.

## Turn on stereo-separated recording

1. Sign in to the PBX web portal and open **Call Features > Recording**.
2. Enable **Support generating stereo-separated recording files (left/right channel)**.

   ![Recording settings with the stereo-separated recording option selected](/images/pbx/split-recording-files1.png)

3. From the **Recording File Format** drop-down, choose the format used when recordings are downloaded.

   ![Recording File Format drop-down showing the available download formats](/images/pbx/stereo-separated-recording-files.png)

   :::note
   The format you pick applies to every recording download across the system, including recordings that already exist.
   :::

   :::caution
   The **.mp3** format limits downloads to one concurrent request, whether the file is pulled through the API or the web portal. Only one .mp3 recording can be downloaded at a time, so bulk exports run slower with this format.
   :::

4. Click **Save**, then **Apply**.

## What happens next

Recordings of one-on-one calls are now saved in stereo, with the audio split across the two channels: the caller is placed on the left channel, while the callee's audio and any system prompts are placed on the right.

:::note
Stereo-separated files carry two full audio tracks, so each recording is roughly twice the size of a standard mono recording.
:::