Langkah 1: Muat naik AMR fail menggunakan butang di atas atau dengan seret dan lepas.
Langkah 2: Klik butang 'Tukar' untuk memulakan penukaran.
Langkah 3: Muat turun fail yang telah ditukar Opus fail
AMR kepada Opus Soalan Lazim Penukaran
How do I convert AMR to Opus audio?
+
Upload your AMR file and PDF.to re-encodes it into a Opus container with sensible default bitrate and sample-rate. The Opus download is ready in seconds.
Is AMR to Opus a lossy or lossless conversion?
+
If both AMR and Opus are lossless (WAV, FLAC, AIFF), no quality is lost. If Opus 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 Opus output use?
+
192 kbps by default for Opus 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 Opus?
+
Yes. ID3 / Vorbis / iTunes-style tags are mapped across formats. Album artwork is preserved when Opus supports it.
Will sample-rate and bit-depth survive the AMR to Opus conversion?
+
Ya secara lalai. Kami tidak menurunkan sampel atau dither melainkan anda memintanya dalam panel pilihan. Untuk suara anda boleh pilih ke 22 kHz mono untuk mengurangkan saiz fail.
Can I convert a stereo AMR to mono Opus?
+
Ya — togol pilihan 'paksa mono'. Ini berguna untuk podcast dan memo suara untuk mengurangkan saiz fail kira-kira separuh.
Does PDF.to support multi-channel (5.1, 7.1) AMR files?
+
Yes for Opus 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 Opus?
+
Yes. Drop a whole folder of AMR files; each becomes a separate Opus and all are zipped for download.
Is the AMR to Opus converter free?
+
Yes, within the free size limit. PRO unlocks much larger files, parallel jobs, and higher bitrates.
Does the converter remove DRM from AMR files?
+
Tidak. PDF.to tidak cuba untuk membuang DRM. Penukaran hanya berjaya pada fail sumber tidak dilindungi.
Will the Opus I download play on iPhone, Android, and desktop?
+
Yes. Opus is supported natively across all major platforms or via universally available codecs. We default to the most-compatible Opus 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 Opus files are deleted within an hour.
