Audio Recorder - WAV, M4A app for iPhone and iPad

It is a recorder app developed in pursuit of simple operation, detailed recording format settings, enhancement of effects during playback.
We can expect many uses such as business side such as meeting and entertainment system such as music.
※ Call recording is NOT supported.

Recording :
- File format: wav, m4a
- Channels: Mono / Stereo
- Supports microphone selection (Bottom / Back) for monoral recording with the built-in microphone.
- Supports stereo recording (Front / Back) with the built-in microphone. (※ There are model restrictions.)
- Supports a wide range of sampling rates.
  - wav: 8 ~ 192 kHz
  - m4a: 44.1, 48 kHz
- Bit depth (wav): 16, 24, 32 bits
- Bit rate (m4a): 64, 128, 192, 256, 320 kbps
- Supports recording in the background.
- Supports additional recording from the end. (save as a new file)

Playback :
- Graphical waveform display.
- Quick jump back/forward of playback position. (Time can be set: 1 ~ 60 seconds)
- Repeat playback in specified section.
- Setting of playback speed. (0.5x ~ 2.0x)
- Setting of pitch. (± 1 octave) ※ In-App Purchase required
- 10 band equalizer. (32 Hz ~ 16 kHz) ※ In-App Purchase required
- Supports playback in background.

Other :
- Supports trimming the recording file. (Reflects speed / pitch and EQ value.)
- Supports sharing the recording file to other apps.
- Supports change of the recording file name.
- Supports filtering display of file names in recording list. (search bar)
- Supports read recording files from iTunes.
- Supports recording using Bluetooth HFP (Hands-Free Profile).
- Supports Auto-Lock ON/OFF.


Note:
Stereo recording with the built-in microphone is limited to the following models (iOS 14~).
iPhone XS/XR, iPhone SE (2nd), iPhone 11~, iPad Pro 11 (1st~), iPad Pro 12.9 (3rd~)
If the model does not support it, the same sound will be recorded on Lch and Rch respectively.