# Mid/Side Decode Decode a Mid/Side file back into a stereo file > Canonical page: https://elysiatools.com/en/tools/audio-mid-side-decode - **Category:** Media - **Keywords:** audio, mid-side, decode, stereo, width, mastering, pan ## Overview Decodes Mid/Side audio back to conventional stereo. Assumes the Mid signal is on the left channel and the Side signal on the right. You can fine-tune Mid and Side contribution to control stereo width while reconstructing the left and right channels. ## Inputs - **Audio File** (file): Select a Mid/Side encoded file (Mid=Left, Side=Right) - **Mid Level (0-2.0)** (range): Scaling applied to Mid when rebuilding stereo. - **Side Level (0-2.0)** (range): Scaling applied to Side (controls width). - **Output Format** (select) ## When to use - When you have an audio file recorded in Mid/Side format and need to convert it to stereo. - When you want to control the stereo width by adjusting the balance between Mid and Side signals. - During audio mastering or mixing to reconstruct conventional stereo from Mid/Side encoding. ## How it works - Upload a Mid/Side encoded audio file where the Mid signal is on the left channel and the Side signal on the right. - Use the Mid Level and Side Level sliders to adjust the contribution of each signal, controlling the stereo width. - Select your preferred output format from options like WAV, MP3, or FLAC. - The tool decodes the audio and generates a stereo file for download. ## Use cases - Converting Mid/Side field recordings to stereo for post-production editing. - Adjusting stereo width in music mastering to enhance spatial perception. - Decoding Mid/Side audio for playback on standard stereo systems. ## Frequently asked questions ### What is Mid/Side encoding? Mid/Side encoding is a technique where audio is recorded with a Mid (center) signal and a Side (stereo difference) signal, often used in microphone setups. ### How do I use the Mid Level and Side Level controls? Adjust the sliders to scale the Mid and Side signals. Increasing Side Level widens the stereo image, while decreasing it narrows it. ### What audio formats can I upload? You can upload any audio file format supported by your browser, such as WAV, MP3, or AAC. ### What output formats are available? The tool supports output in MP3, AAC, M4A, OGG Vorbis, Opus, FLAC, and WAV formats. ### Is there a limit on file size? Yes, the maximum file size is 200 MB. ## Related tools - [DSD to PCM Converter](https://elysiatools.com/en/tools/dsd-to-pcm): Convert DSD (Direct Stream Digital) audio files to PCM WAV format with selectable bit depth and sample rate - [HDR AVIF to SDR PNG Tone Mapper](https://elysiatools.com/en/tools/hdr-avif-to-sdr-png): Decode PQ or HLG AVIF, convert BT.2020 to sRGB, and tone map highlights into a viewable SDR PNG. - [Backing Vocal Width Expander](https://elysiatools.com/en/tools/audio-backing-vocal-width): Turn a single vocal into a wide stereo harmony stack of 3, 5, or 7 transposed voices panned across the field. - [Audio Goniometer](https://elysiatools.com/en/tools/audio-goniometer): Render a polar stereo image to visualize width and panning - [Audio Join 5.1](https://elysiatools.com/en/tools/audio-join-5-1): Join six mono tracks into a 5.1 surround file - [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 - [Mid/Side Encode](https://elysiatools.com/en/tools/audio-mid-side-encode): Encode a stereo file into Mid/Side channels ## 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.