ccr-import

CCR Import — Cube Call Recorder → Local Filesystem

Cube Call Recorder ACR (com.catalinagroup.callrecorder) is Daniel's default Android call recorder. Both regular phone calls and VoIP/WhatsApp calls are captured.

Save path

/sdcard/Calls/CCR/CubeCallRecorder/All/

Important: Do not confuse with /sdcard/Recordings/Calls/, which is the Android system call recorder and contains a different filename format (YYYYMMDD_HHMMSS.SS+TZ_{IN|OUT}_simN_+PHONENUMBER.oga). CCR's own recordings are under /sdcard/Calls/CCR/CubeCallRecorder/All/.

To confirm path at any time:

adb shell 'find /sdcard/Calls -maxdepth 5 -type d' | tr -d '\r'

Filename format

{source}_{YYYYMMDD}-{HHMMSS}_{contact}.amr

Examples:

mic_20260327-052816.amr
whatsapp_20260421-221612_Claire Rosehill.amr

Fields:

Field	Example	Meaning
Source	mic / whatsapp / voip	Capture channel. mic = phone microphone (regular call or fallback). whatsapp = WhatsApp accessibility-stream capture (VoIP). Other VoIP apps may show as their own prefix.
Date	20260421	Local date, YYYYMMDD
Time	221612	Local start time, HHMMSS
Contact	Claire Rosehill	CCR's resolved contact name (may contain spaces). Absent for unknown/unresolved numbers.

File extension is .amr (Adaptive Multi-Rate, narrow-band). ffmpeg, AssemblyAI, and Whisper all handle it directly. Bit rate is low (~12 kbps) — fine for speech transcription, marginal for music or tonal analysis.

mic_ vs whatsapp_ (or other VoIP) for the same time window

When CCR has both capture modes active for a VoIP call, you may see overlapping mic_ and whatsapp_ files for the same interval. Prefer the whatsapp_ (or app-specific) file for transcription — it captures the VoIP stream via accessibility service, bypassing speaker-to-mic loss and ambient noise. mic_ is useful as fallback if the app-stream capture is corrupted or missing.

Never transcribe both streams concatenated — they're the same audio captured twice, and concatenating produces a garbled transcript.

Standard import workflow

1. Confirm device is connected

adb devices

2. List recent recordings

# All, newest last (alphabetic sort happens to be chronological thanks to the filename format)
adb shell 'ls "/sdcard/Calls/CCR/CubeCallRecorder/All/"' | tr -d '\r' | tail -30

# By date
adb shell 'ls "/sdcard/Calls/CCR/CubeCallRecorder/All/" | grep 20260421' | tr -d '\r'

# By contact
adb shell 'ls "/sdcard/Calls/CCR/CubeCallRecorder/All/" | grep "Claire Rosehill"' | tr -d '\r'

3. Pull files

adb pull doesn't accept globs — loop over filenames. Quote paths, since CCR filenames contain spaces.

DEST=recordings/inbox
while IFS= read -r f; do
  adb pull "/sdcard/Calls/CCR/CubeCallRecorder/All/$f" "$DEST/" 2>&1 | tail -1
done < <(adb shell 'ls "/sdcard/Calls/CCR/CubeCallRecorder/All/" | grep 20260421' | tr -d '\r')

4. Concatenate fragmented sessions

CCR often splits a single conversation into multiple files (call drops, reconnections, mode switches). To stitch back into one file for transcription:

cd recordings/inbox
ls whatsapp_20260421-*_Claire\ Rosehill.amr | sort > /tmp/concat_list.txt
# ffmpeg concat demuxer needs a file listing with `file '...'` per line
awk '{ printf "file %s\n", "\x27"$0"\x27" }' /tmp/concat_list.txt > /tmp/concat.ffmpeg
ffmpeg -y -f concat -safe 0 -i /tmp/concat.ffmpeg -c copy 2026-04-21-ac-concatenated.amr

For cross-codec safety (if files have differing codec params), re-encode rather than stream-copy:

ffmpeg -y -f concat -safe 0 -i /tmp/concat.ffmpeg -c:a libopus -b:a 24k 2026-04-21-ac-concatenated.opus

Common pitfalls

• Path confusion. /sdcard/Recordings/Calls/ (system recorder, .oga) is NOT the CCR path. CCR lives at /sdcard/Calls/CCR/CubeCallRecorder/All/ (.amr).
• Spaces in filenames. Contact names contain spaces. Always quote. ls output with tr -d '\r' and a while read -r loop is safer than for f in $(...).
• Double-capture overlap. mic_ + {app}_ files from the same time window are the same audio. Don't concatenate across sources.
• Low bit-rate. AMR is narrow-band (8 kHz sample rate). Don't expect waveform or speaker-embedding quality comparable to WAV/Opus. For voice ID via resemblyzer, you can still extract embeddings but accuracy drops vs. clean samples.
• Daily rollovers. CCR's "All" folder is flat and can accumulate thousands of files. Prefer targeted grep by date or contact over ls full-listing.

Related

• adb-ops:pull-folder — generic pull utility
• ~/repos/github/my-repos/Maternal-Conversation-Analysis/.claude/commands/import-from-phone.md — workspace-specific CCR import