Audio file size guide — what your files actually weigh and what fits in 150MB
How large are audio files in practice? WAV, FLAC, AIFF, and MP3 file sizes explained by format, sample rate, bit depth, and duration — with a practical guide to TYFRA Vault's 150MB limit.
Audio file size is one of those things musicians care about when it causes a problem — a file too large to upload, a stem pack that does not fit in a shared folder, a master that bounces at a size the distributor does not accept — and ignore the rest of the time. Understanding what determines audio file size, and how large common formats actually are in practice, takes about five minutes and prevents a recurring set of workflow frustrations.
This page explains what determines audio file size, gives practical size estimates for common formats and durations, and provides a clear guide to what fits within TYFRA Vault's 150MB per file limit.
What determines audio file size
An audio file's size is determined by four variables: the format (compressed or lossless), the sample rate, the bit depth, and the duration. Understanding each one makes the size of any given file predictable.
Format — compressed vs lossless
Lossless formats (WAV, FLAC, AIFF) store the audio data with no quality reduction. The file size accurately reflects the original recording. WAV and AIFF are uncompressed lossless formats — they store data directly with no further reduction. FLAC is a compressed lossless format — it applies lossless compression that reduces file size (typically by 40–60% compared to WAV) without any quality loss. The decompressed audio is bit-for-bit identical to the original.
Lossy formats (MP3, AAC, OGG) apply irreversible compression that permanently removes audio data deemed less perceptually significant. The trade-off is significantly smaller file sizes at the cost of audio quality that cannot be restored. An MP3 at 320kbps is a fraction of the size of the equivalent WAV and sounds very similar to most listeners in most contexts, but it is not a lossless representation of the original.
Sample rate
Sample rate is the number of audio samples captured per second, measured in Hz or kHz. Standard rates for music production:
- 44,100 Hz (44.1 kHz) — the CD standard and the most common for consumer music distribution. Required by many streaming platforms and physical media.
- 48,000 Hz (48 kHz) — the video production standard, common in film and TV work. Increasingly used in music production for compatibility with video workflows.
- 88,200 Hz / 96,000 Hz — high sample rate formats used in professional recording and mastering. File sizes roughly double compared to 44.1/48 kHz equivalents.
Higher sample rate = larger file. A 96 kHz file is approximately twice the size of the equivalent 48 kHz file at the same bit depth and duration.
Bit depth
Bit depth determines the dynamic range of the recording — how many gradations of volume it can represent. Standard bit depths:
- 16-bit — the CD standard. 65,536 volume levels. Sufficient for consumer distribution.
- 24-bit — the professional recording standard. 16,777,216 volume levels. Significantly more headroom for production and mixing. The standard for any serious studio work.
- 32-bit float — used in some DAWs internally for processing. Rarely used for distribution.
Higher bit depth = larger file. A 24-bit file is 50% larger than the equivalent 16-bit file at the same sample rate and duration.
Duration
Longer audio = larger file. Straightforwardly proportional — a 10-minute file is twice the size of the equivalent 5-minute file.
Practical file sizes — a reference guide
The following are approximate sizes for common formats, sample rates, and durations. These are calculated figures — actual sizes may vary slightly due to file header data and encoding implementation.
WAV files (uncompressed lossless)
| Duration | 16-bit / 44.1 kHz | 24-bit / 44.1 kHz | 24-bit / 48 kHz | 24-bit / 96 kHz |
|---|---|---|---|---|
| 1 minute | ~10 MB | ~15 MB | ~16 MB | ~33 MB |
| 3 minutes | ~30 MB | ~45 MB | ~49 MB | ~99 MB |
| 5 minutes | ~50 MB | ~76 MB | ~82 MB | ~165 MB |
| 8 minutes | ~80 MB | ~121 MB | ~132 MB | ~264 MB |
| 10 minutes | ~100 MB | ~151 MB | ~165 MB | ~330 MB |
FLAC files (lossless compressed — typically 40–60% of equivalent WAV)
| Duration | ~24-bit / 44.1 kHz | ~24-bit / 48 kHz |
|---|---|---|
| 3 minutes | ~18–27 MB | ~20–29 MB |
| 5 minutes | ~30–45 MB | ~33–49 MB |
| 8 minutes | ~48–73 MB | ~53–79 MB |
MP3 files (lossy compressed)
| Duration | 128 kbps | 256 kbps | 320 kbps |
|---|---|---|---|
| 3 minutes | ~2.9 MB | ~5.8 MB | ~7.2 MB |
| 5 minutes | ~4.7 MB | ~9.4 MB | ~11.7 MB |
| 8 minutes | ~7.3 MB | ~14.6 MB | ~18.3 MB |
What fits within TYFRA Vault's 150MB per file limit
TYFRA Vault supports files up to 150MB per file. Based on the figures above:
Comfortably within the limit (most music production scenarios):
- A WAV at 24-bit / 44.1 kHz up to approximately 10 minutes
- A WAV at 24-bit / 48 kHz up to approximately 9 minutes
- An individual stem at any professional resolution and typical 3–5 minute track length
- A full stereo mix or master at professional resolution for typical track lengths
- A FLAC file at any standard resolution up to very long durations
- An MP3 at any bitrate for any typical track length
Approaching the limit (be aware):
- A WAV at 24-bit / 96 kHz between 4–5 minutes sits around 130–165 MB — near or slightly over the limit depending on exact duration
- A WAV at 24-bit / 48 kHz at 9+ minutes approaches 150 MB
Likely to exceed the limit:
- WAV files at 24-bit / 96 kHz over 4–5 minutes
- Live set recordings (45–90 minutes) at any professional resolution
- Multi-hour interview or podcast recordings at lossless quality
- Full DAW project bundles (which may contain hundreds of individual audio clips)
The practical answer for most music production use:
The 150MB limit accommodates individual stems, full mixes, and masters for standard track lengths (up to approximately 8–10 minutes) at professional 24-bit / 44.1 or 48 kHz resolution. For longer recordings, FLAC provides lossless quality at approximately half the file size of an equivalent WAV, comfortably extending what fits within the limit.
File size and format choice for different purposes
Understanding file sizes also informs format decisions for different delivery contexts.
For storage and archive: WAV or FLAC at 24-bit / 44.1 or 48 kHz. FLAC is the more storage-efficient choice with no quality trade-off. WAV is more universally compatible with older systems and some DAWs.
For distribution: Most distributors accept 16-bit or 24-bit WAV at 44.1 or 48 kHz. Check your distributor's specific requirements — some have maximum file size restrictions that may affect high-sample-rate files.
For DJ promos: MP3 at 320 kbps is the standard for DJ promo delivery — sufficient quality for booth playback, manageable file size. Some artists and labels deliver WAV promos to key contacts; this is a positioning choice rather than a quality requirement.
For streaming platforms: Distributors transcode your uploaded master to each platform's required format. Upload the highest quality file you have — the transcoding process will handle the rest.
For client delivery (mixing/mastering): Always WAV or AIFF at the session's native resolution. Never deliver lossy files to a client who will process them further — each generation of lossy encoding compounds the quality loss.
Reducing file size without quality loss
If a specific file is too large for a platform's limit:
Switch from WAV to FLAC. Lossless compression with no quality trade-off — typically reduces file size by 40–60%. A 200 MB WAV becomes approximately 80–120 MB as FLAC. TYFRA Vault accepts both.
Reduce the sample rate to 48 kHz if using 96 kHz. Unless the specific workflow requires 96 kHz, 48 kHz is sufficient for professional quality and half the file size.
Trim unnecessary silence. A recording with 30 seconds of silence at the beginning and end is 30 seconds longer than it needs to be. Trim to the actual audio content.
Split long recordings into sections. A 20-minute live set recording at 24-bit / 48 kHz can be split into two 10-minute files, each well within the 150 MB limit.
How TYFRA fits
- Vault: 150MB per file limit, clearly explained
- Vault: supports WAV, FLAC, AIFF, and MP3 — all stored at original quality
- Vault: lossless storage with no re-encoding applied
- Vault: BunnyCDN delivery — fast regardless of file size within the limit
- Practical context: the 150MB limit covers almost all standard music production scenarios at professional resolution
- £9.99/mo · free tier available
Product verification: table figures are approximate (~); confirm whether the 150MB limit applies equally across formats and membership tiers.
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