# Audio Channel Mixer Mix left and right channels into mono with specific ratios > Canonical page: https://elysiatools.com/en/tools/audio-channel-mix - **Category:** Media - **Keywords:** audio, stereo, mono, channel, mix, ratio, balance, blend, custom ## Overview Creates a mono file by mixing the left and right channels with customizable ratios. You can control how much of each channel contributes to the final output. Perfect for creating custom center-weighted mixes, emphasizing one channel, or creating unique mono conversions with specific balance. ## Inputs - **Audio File** (file): Select a stereo audio file - **Left Channel Ratio (0-1.0)** (range): Amount of left channel in the mix. 0 = none, 1 = full volume. - **Right Channel Ratio (0-1.0)** (range): Amount of right channel in the mix. 0 = none, 1 = full volume. - **Output Format** (select) ## When to use - When converting stereo audio to mono for compatibility with mono playback devices or platforms. - When you need to emphasize or reduce one channel in a stereo recording before mono conversion. - When creating custom mono mixes with a specific left-right balance for podcasts, videos, or installations. ## How it works - Upload a stereo audio file in a supported format such as MP3, WAV, or AAC. - Adjust the left and right channel ratios using sliders, with values from 0 (no contribution) to 1.0 (full volume). - Select the output format from options like MP3, AAC, M4A, OGG, Opus, FLAC, or WAV. - Process the file to generate a mono audio file with your specified channel mix. ## Use cases - Converting stereo podcasts or interviews to mono for consistent audio on mono devices. - Adjusting channel balance in stereo recordings to enhance dialogue or specific elements before mono conversion. - Creating mono audio tracks for art installations, public announcements, or other single-channel applications. ## Frequently asked questions ### What audio file formats can I upload? You can upload stereo audio files in common formats like MP3, WAV, AAC, and others, up to 200 MB. ### How do the left and right ratios work? The ratios control the volume level of each channel in the mono mix. For example, a ratio of 0.5 means half volume. ### Can I create a mono file from only one channel? Yes, set the ratio for the other channel to 0 to exclude it from the mix. ### What output formats are supported? Supported formats include MP3, AAC, M4A, OGG, Opus, FLAC, and WAV. ### Is there a file size limit? Yes, the maximum file size for upload is 200 MB. ## Related tools - [AAC to M4A Converter](https://elysiatools.com/en/tools/aac-to-m4a): Convert AAC audio files to M4A (MPEG-4 Audio) format with quality and channel controls - [AAC to MP3 Converter](https://elysiatools.com/en/tools/aac-to-mp3): Convert AAC audio to MP3 with controllable bitrate, resampling, and channel selection - [AAC to OGG Converter](https://elysiatools.com/en/tools/aac-to-ogg): Convert AAC audio files to OGG Vorbis format with quality and channel controls - [Audio Channel Mapper](https://elysiatools.com/en/tools/audio-channel-mapper): Remap audio channels to different outputs - [Drum Loop Slicer](https://elysiatools.com/en/tools/audio-drum-loop-slicer): Detect drum-hit transients in an audio loop, slice it into individual hits, and export them as a ZIP with timing and optional MIDI. - [Audio Join Stereo](https://elysiatools.com/en/tools/audio-join-stereo): Join two mono tracks into a single stereo file - [Extract Left Channel](https://elysiatools.com/en/tools/audio-left-channel-extract): Extract only the left channel to a mono file - [Audio Master Reference Match](https://elysiatools.com/en/tools/audio-master-reference-match): Match your mix's tonal balance and loudness to a reference track and export the corrected master, with a before/after third-octave band report. ## Samples - [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio - [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows ## Related content - [Audio Channel Routing and Delivery Verification](https://elysiatools.com/en/hubs/audio-channel-routing): Route, split, join, and convert mono or stereo audio while preserving left/right intent and checking the final file before delivery.