How to Send Large Audio Files via Email

You have a high-quality audio file — a full album WAV master, a podcast episode, a recording session, or a batch of AIFF stems — and you need to send it by email. The problem: WAV and AIFF files are uncompressed, so they're enormous. A single song at 24-bit/96kHz can exceed 300MB. Gmail's 25MB limit and Outlook's 20MB limit mean your file won't attach at all.

SendSplit accepts your audio file (or a ZIP of multiple files), splits it into numbered ZIP parts, and delivers each as a standard email attachment — up to 200MB, no accounts required. The recipient downloads all parts, extracts once, and gets the full original audio files — no transcoding, no quality loss.

Why Large Audio Files Are Hard to Send via Email

Audio format choice directly determines file size:

  • Lossless formats (WAV, AIFF, FLAC) — used in professional audio production; a 5-minute stereo WAV at 44.1kHz/16-bit is around 50MB; at 24-bit/96kHz, it's over 100MB per track
  • Compressed formats (MP3, AAC, OGG) — typically 3–10MB per song, but original-quality stems and masters are always lossless; sending MP3 when the client expects WAV is not acceptable
  • Multi-track sessions — a full session ZIP of stems for a single song can easily exceed 500MB

Transcoding to MP3 just to fit the attachment limit means permanent quality loss. The recipient can't work with lossy audio in a professional context.

How to Send Large Audio Files via Email with SendSplit

For a single audio file, upload it directly. For multiple tracks or stems, zip them first.

For a single file:

  1. Go to sendsplit.com/upload-to-send and upload your audio file (WAV, AIFF, FLAC, MP3 — up to 200MB)
  2. Choose a split size: 10MB for corporate or unknown recipients, 20–25MB for personal inboxes
  3. Enter the recipient's email address and click send

For multiple files or a full session:

  1. Zip all files into a single archive first:
    • Windows: select all files → right-click → Send to → Compressed (zipped) folder
    • macOS: select all files → right-click → Compress X Items
    • Linux: zip -r session_stems.zip stems/
  2. Upload the ZIP to SendSplit and proceed as above

Recipient side:

  1. Receives a series of emails, each with a numbered ZIP part (e.g., Vocals_Final.wav.001)
  2. Downloads all parts into the same folder
  3. Opens the first part (.001) with any archive tool — 7-Zip, WinRAR, macOS Archive Utility, or Windows Explorer — which automatically reassembles and extracts the original file
  4. Gets the full audio file or session — original format, original bitrate, nothing re-encoded

Email Filters and Audio Attachments

Split ZIP parts containing audio are treated as standard attachments by most mail servers. However, some enterprise filters may be more cautious:

  • Ask the recipient to check spam or quarantine if parts don't arrive
  • Enable password protection when sending — encrypted archives are not content-scanned, which can help delivery through strict gateways
  • Use 10MB splits if the recipient is on a corporate mail server — smaller parts are less likely to trigger size-based rejection

Tips for Sending Audio Files via Email

  • Keep filenames professional — ClientName_Track01_Final_Master.wav is unambiguous; vague names like audio.wav create confusion when the recipient extracts multiple sessions
  • Include a version suffix — _v2 or _Final in the filename saves a follow-up question about which file is current
  • Zip stems together with a session notes file — a plain-text file listing BPM, key, and format info is tiny and saves the recipient a clarification email
  • Use 10MB splits when sending to labels or studios — corporate mail systems often cap individual messages at 10MB; 10MB is the safest default for professional recipients
  • Password protect session files — unreleased audio is a leak risk; enable SendSplit's optional encryption for masters and sessions not yet public

Stop compressing to MP3 to fit the attachment limit. Try SendSplit — upload your WAV, AIFF, or session ZIP and deliver the full-quality audio to any inbox as standard email attachments, up to 200MB, no accounts required.