Upload your AMR file and PDF.to re-encodes it into a DTS container with sensible default bitrate and sample-rate. The DTS download is ready in seconds.
Is AMR to DTS a lossy or lossless conversion?
+
If both AMR and DTS are lossless (WAV, FLAC, AIFF), no quality is lost. If DTS is lossy (MP3, AAC, OGG, Opus), audio is re-encoded; we default to a high bitrate (192-320 kbps) for near-transparent quality.
What bitrate does the DTS output use?
+
192 kbps by default for DTS where applicable. Use the options panel to pick 96, 128, 192, 256, or 320 kbps depending on whether you want smaller files or higher fidelity.
Are tags (artist, title, album) preserved when converting AMR to DTS?
+
Yes. ID3 / Vorbis / iTunes-style tags are mapped across formats. Album artwork is preserved when DTS supports it.
Will sample-rate and bit-depth survive the AMR to DTS conversion?
+
Yes by default. We do not downsample or dither unless you ask for it in the options panel. For voice you can opt into 22 kHz mono to shrink file size.
Can I convert a stereo AMR to mono DTS?
+
Yes — toggle the 'force mono' option. This is useful for podcasts and voice memos to roughly halve file size.
Does PDF.to support multi-channel (5.1, 7.1) AMR files?
+
Yes for DTS formats that support multi-channel (AC3, FLAC, Opus). For stereo-only targets, multi-channel audio is downmixed using a perceptually weighted mix.
Can I batch-convert AMR files to DTS?
+
Yes. Drop a whole folder of AMR files; each becomes a separate DTS and all are zipped for download.
Is the AMR to DTS converter free?
+
Yes for files under 100 MB. PRO unlocks larger files (5 GB), parallel jobs, and higher bitrates.
Does the converter remove DRM from AMR files?
+
No. PDF.to does not attempt to remove DRM. Conversions only succeed on unprotected source files.
Will the DTS I download play on iPhone, Android, and desktop?
+
Yes. DTS is supported natively across all major platforms or via universally available codecs. We default to the most-compatible DTS profile.
Are my AMR files private during conversion?
+
Yes. Uploads are encrypted in transit, the conversion runs in an isolated worker, and both the AMR and DTS files are deleted within an hour.