10月15日的Audio Recorder - WAV, M4A应用程序分析

A recorder app developed in pursuit of simple operation, detailed recording format settings, enhanced playback effects, and spectrum display. 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. - Supports a wide range of sampling rates.   - wav: 8, 16, 22.05, 32, 44.1, 48, 96, 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 - Time effect ("Speed / Pitch" or "Varispeed") - Setting of playback speed. (0.5x ~ 2.0x) - Setting of pitch. (± 1 octave) ※ In-App Purchase required - Setting of varispeed. (0.5x ~ 2.0x) - 10 band equalizer. (32 Hz ~ 16 kHz) ※ In-App Purchase required - Center Cancel / Center Emphasis - Lch, Rch each mute - Supports playback in background. Trimming : - Supports trimming of the recording file on the playback screen. - The trimmed file reflect the values ​​set in "Speed/Pitch" or "Varispeed" and "EQ". Spectrum Display: - Displays the waveform of recording files and a real-time spectrum linked to playback. - Supports zooming in the frequency direction of the spectrum. - Channel display switching (Mix / L / R). - Frequency axis display switching: Linear, Log - FFT size: 1024, 2048, 4096, 8192 - Window function: Hann, Hamming, Blackman, None - Octave analysis: FFT, 1/12, 1/6, 1/3, 1, calculation method: Max, Ave - Pitch meter display. Transcription screen : (* Available on iOS 26 or later.) Transcribes speech in the selected audio file. The results are divided into recognized speech segments and displayed in cells with their start times. Tap a cell to move to that position. Other : - Supports sharing the recording file to other apps. - Supports saving the recording file to iCloud Drive. - 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.