CONVERT
SPX → TTA
Fast, secure SPX to TTA conversion. No registration required.
DRAG. DROP. DONE.
Upload any file and our engines will handle format detection automatically.
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Opening note — SPX is an audio format with specific trade-offs between file size, bitrate flexibility, and device support. The TTA you want is two clicks away. Need a TTA version of a SPX recording for a podcast host, audio book platform or DAW that refuses the original container? Drop the file above and our encoder produces a clean TTA you can drag straight into the destination tool. Metadata such as title, artist and cover art travels with the audio. Context: SPX is an audio format with specific trade-offs between file size, bitrate flexibility, and device support. TTA is the True Audio lossless codec, fast to decode on low-power devices.
Speex Audio
Source formatSpeex is an open-source audio compression format specifically designed for speech encoding. It uses Code-Excited Linear Prediction (CELP) and supports narrowband, wideband, and ultra-wideband modes for different speech quality requirements.
True Audio Lossless
Target formatTTA (True Audio) is an open-source lossless audio codec that provides real-time lossless compression with hardware-friendly decoding. It achieves compression ratios similar to FLAC while maintaining very low CPU requirements during playback.
Why convert SPX to TTA
Speex Audio is great in its own niche, but True Audio Lossless is either more universally playable or better suited to the device you are targeting. Converting lets you ship the audio without asking listeners to install a codec. The loss in quality between the two is negligible at sensible bitrates.
HOW TO CONVERT
SPX → TTA
Upload the SPX
Drop or select your SPX file. The upload is encrypted and the file is queued for conversion.
Transcode via FFmpeg
FFmpeg decodes the SPX stream to PCM internally, then re-encodes as TTA at the bitrate you select.
Download the TTA
The TTA is delivered as a direct download; metadata and cover art transfer automatically where possible.
Common Use Cases
Podcast distribution
Podcast hosts (Spotify, Apple, Acast) publish audio as TTA when the workflow requires it; converting upfront skips server-side transcoding.
DAW ingestion
Pro Tools, Logic, Ableton and Reaper pull TTA into projects without decode overhead, so scrubbing and waveform display are snappy.
Portable players
TTA plays reliably on old iPods, car stereos, Bluetooth speakers and fitness trackers where SPX support is spotty.
Voice memo sharing
Voice notes recorded as SPX travel to phones and desktops as TTA without recipients installing extra codecs.
Quality & Compatibility
Lossy-to-lossy transcoding (most cross-format audio jobs) loses a tiny amount of quality on each pass — usually inaudible at our default VBR ~190 kbps for music or 96 kbps for speech. Lossy-to-lossless conversions freeze the existing quality but cannot improve it; lossless-to-lossy is only as good as the target bitrate you choose.
Tips for Best Results
- Pick 128 kbps for podcasts and voice, 192–256 kbps for music, 320 kbps only if the audio will be edited further downstream.
- Keep the SPX master alongside the TTA — re-encoding a lossy format twice accumulates audible artefacts.
- For mono voice content, convert to mono TTA explicitly to halve file size without any quality loss.
Frequently Asked Questions
Frequently Asked Questions
Lossy-to-lossy conversions (most combinations) re-compress the audio, which technically introduces some loss. At a 192 kbps or higher target it is inaudible on normal equipment. Lossy-to-lossless conversions freeze the existing quality but cannot improve it; lossless-to-lossy transcodes are only as good as the target bitrate you choose.
For voice content (podcasts, audiobooks, lectures) 128 kbps is indistinguishable from higher bitrates. For music, 192-256 kbps covers most listening; 320 kbps is the ceiling for TTA and the right choice for audio you plan to edit further. Above that, prefer a lossless target instead.
Yes. Title, artist, album, year and cover art travel from the SPX container to the TTA container automatically where both formats support them. If a tag field has no TTA equivalent, it is dropped silently. Use any tag editor (Mp3tag, MusicBrainz Picard) to fine-tune afterwards.
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Secure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 2 hours. We never read, share, or store your data.