# Audio Podcast Trailer Builder Assemble a short podcast trailer from intro music, up to 5 highlight clips, a music bed under the clips, and a loudness target. > Canonical page: https://elysiatools.com/en/tools/audio-podcast-trailer-builder - **Category:** Media - **Keywords:** audio, podcast, trailer, teaser, promo, clips, intro, music bed, loudness, assemble ## Overview Builds a promotional trailer in one pass: the intro music plays, then your highlight clips are concatenated (or crossfaded) with a background music bed ducked underneath, and the whole thing is loudness-normalized to a platform target (Spotify/Apple Podcasts/etc.). Each clip is trimmed to the duration you set. Optionally add a closing music outro. Great for 15-60 second social media teasers. ## Inputs - **Intro Music** (file): Select intro/outro music - **Clip 1** (file): First highlight clip - **Clip 2** (file): Second highlight clip (optional) - **Clip 3** (file): Third highlight clip (optional) - **Clip 4** (file): Fourth highlight clip (optional) - **Clip 5** (file): Fifth highlight clip (optional) - **Clip Duration (s)** (number) - **Crossfade (s)** (number) - **Music Under Clips (dB)** (number) - **Target LUFS** (number) - **Output Format** (select) ## When to use - Creating short 15-to-60-second social media teasers to promote upcoming podcast episodes. - Combining multiple highlight clips from an interview with a background music bed and intro track. - Normalizing a promotional trailer's loudness to meet standard platform targets like -16 LUFS. ## How it works - Upload your primary intro music track and at least one highlight clip from your episode. - Configure clip duration, crossfade timing, and the volume level of the background music bed. - Select your target LUFS loudness level and preferred output format (such as MP3 or WAV). - Generate the trailer to automatically concatenate, duck, and normalize the audio into a single promotional file. ## Use cases - Creating a 30-second teaser for Spotify using three key quotes from a guest interview. - Building a quick promotional intro clip for social media channels like Instagram or TikTok. - Assembling a standard episode preview with consistent branding music and normalized loudness. ## Frequently asked questions ### What audio formats are supported for output? You can export your finished podcast trailer in MP3, WAV, FLAC, M4A, or OGG formats. ### How many highlight clips can I include in a single trailer? You can upload a minimum of one and up to five highlight clips to be concatenated. ### What does the 'Music Under Clips' setting do? It controls the volume level (in decibels) of the background music bed while your highlight clips are playing, ducking it so the voices remain clear. ### Can I adjust the duration of each highlight clip? Yes, you can set the clip duration anywhere between 2 and 120 seconds, and the tool will trim them automatically. ### What loudness targets can I set for the output? You can set a target LUFS value between -30 and -5 to match the requirements of different distribution platforms. ## Related tools - [Audio Add Chapters](https://elysiatools.com/en/tools/audio-add-chapters): Add chapters to an audio file from a label/chapters file - [Audio Add Silence](https://elysiatools.com/en/tools/audio-add-silence): Add a specified duration of silence to the start or end of an audio file - [Audio Ambience Loop Generator](https://elysiatools.com/en/tools/audio-ambience-loop-generator): Extract the background ambience/room tone from a fragment and generate a seamless loop of any target length. - [Batch Audio Normalize](https://elysiatools.com/en/tools/audio-batch-normalize): Normalize multiple audio files to a target peak level with consistent volume across the batch - [Audio Breath Control Editor](https://elysiatools.com/en/tools/audio-breath-control-editor): Detect breaths in speech and naturally crossfade to reduce, remove, or keep them. - [Extract Center Channel](https://elysiatools.com/en/tools/audio-center-channel-extract): Extract the center channel from a surround audio file or video audio track - [Audio Change Bitrate](https://elysiatools.com/en/tools/audio-change-bitrate): Re-encode audio to a new bitrate while keeping the same format - [Audio Cutter](https://elysiatools.com/en/tools/audio-cutter): Cut and extract audio clips from audio files with precise time selection ## 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 - [Podcast Recording, Editing, and Delivery](https://elysiatools.com/en/hubs/podcast-recording-editing-delivery): Rescue remote voices, clean speech artifacts, shape the edit, master loudness, add show assets, and validate podcast files before delivery.