Phakchi vs Wavelet Voice Sonogram

. Welcome to Phakchi! The standard Thai keyboard (Kedmanee) is popular and widely used. However, since it was originally designed for computers with a 5-row × 12-column layout, the keys become very small on an iPhone screen, which often leads to mistaps. Phakchi solves this problem by adopting a 6-row × 8-column layout while keeping a familiar key arrangement similar to the standard keyboard. This makes it easier for experienced Thai typists to type comfortably on an iPhone. In addition, Phakchi also offers a dictionary-order layout for consonants, making it fun and accessible even for Thai learners who are still getting used to the script. 2. Features (1) Easy Thai typing on iPhone – Thanks to the 6×8 key layout. (2) Familiar key arrangement – Similar to the standard Thai keyboard, so you can type fast right away. (3) Color-coded keys – Consonants are black, vowels and tone marks are blue, making characters easier to find. (4) Dictionary-order layout option – Great for Thai learners. (5) Helpful key labels – Shows dictionary-order numbers on consonants and pronunciation marks on all characters. (6) One-handed typing – Available via the L, C, and R keys shown on the first screen.* (7) Six input modes – A-side and B-side (for frequently/less frequently used Thai letters), numbers, symbols, Thai numerals, and English letters. *The L/C/R keys temporarily disappear while typing in Thai, but they reappear after rotating the iPhone and returning it to the normal position. 3.Compatibility etc. (1)Compatibility ·iPhone: Compatible with iPhone SE (2nd generation) to iPhone 17 series ·iPad: Compatible with iPad (5th generation) to iPad with A16 chip (2)Operating System ·iOS: Supports iOS 15.0 – iOS 18.x and iOS 26.x ·iPadOS: Supports iPadOS 15.0 – iPadOS 26.x (3)Interface Languages English, Thai, Japanese (Information as of November 2025) 4.Initial Settings [1] Keyboard Setup ·On the iOS Home screen, tap the Settings icon. ·Go to General → Keyboard → Add New Keyboard... ·Tap Phakchi to add it to your keyboards. [2] Enabling Key Tap Sounds (Allow Full Access) ·Go to Settings → Accessibility → Keyboards and Input. ·Tap Full Keyboard Access. ·Turn on the Full Keyboard Access switch. ·Once this setting is enabled, you can control key tap sounds on or off from the switch inside the host app. 5.Usage Tips • To switch between Side A and Side B, use the key labeled [to sideB] or [to sideA]. • After typing a character on Side B, the keyboard automatically returns to Side A. • If you want to type multiple keys on Side B, tap the hold key first, then tap the characters you want to enter. • Side B hold mode can be canceled by tapping the hold key again or switching to another mode. • To enter Thai numerals, tap the [T123] key. On iPhone, you can access this from the [123] number mode. 6. About the Developer ·Name: Takayuki Imai ·Email: snowysap@gmail.com ·Support Website: https://superscript.sakura.ne.jp/ 7. Privacy Policy ·The app does not transmit any information typed on the keyboard over the Internet. ·The developer will never disclose or sell any personal information such as your name, email address, or communication content without your consent.

"Wavelet Voice Sonogram" is a sound spectrogram app that performs time-frequency analysis of acoustic signals. A spectrogram is a graph displaying the results of a sound frequency spectrum analysis, with time on the horizontal axis, frequency on the vertical axis, and signal strength represented by colors. This app can perform acoustic analysis and display the spectrograms by using three time-frequency analysis methods, Wavelet analysis, Octave Band analysis, and FFT analysis. It can also record sounds from iPhone's built-in microphone. While playing back a recording, you can search for the desired sound and analyze it. "Wavelet Voice Sonogram" makes it easy to analyze the acoustics of speech, instrumental sounds, noise, and more. It can also be used to learn the basics of speech analysis. Features: - Acoustic analysis can be performed using PCM data recorded with the iPhone's built-in microphone. It is possible to analyze 5 seconds of sound data backward from a user-specified point in time. - Three types of acoustic analysis, FFT analysis, octave band analysis and wavelet analysis, can be performed simultaneously. - PCM sound recording and playback is possible up to about 180 seconds, and the audio waveform graph and FFT analysis graph are displayed. While playing back sound, you can search for sound at any point in time. - Zoom in on a specific 10 seconds of PCM data and play back the sound. Used to find a specific sound at the point in time you want to analyze. - The spectrogram analysis result and time axis waveform can be contrasted and played back. Specifications: - Sampling frequency: 48 kHz - PCM recording time: approx. 180 seconds max. - Sound zoom function (10-Sec): Zooms in on any 10 seconds of PCM data and plays back the sound. - 3 types of acoustic analysis function (Analysis): About 5 seconds (Analysis points can be specified using the Time position slider.) -- FFT analysis (FFT): FFT 2048 points -- Octave band analysis (OCT): 1/48 octave band -- Wavelet analysis (DWT): Gabor Wavelet - Sound recording and playback, sound waveform and FFT graph display (Main): PCM graph, 10sec zoom graph, FFT graph. - Time position slider: Points to the cursor position on PCM graph. - Spectrogram display (FFT / OCT / DWT): 5 sec PCM graph and spectrogram analysis graph (vertical axis - time [0 - 5.0 sec], horizontal axis - frequency [100Hz - 8kHz]) - Snapshot (Snap): Save the analysis image in "Photos". Notes: - The acoustic analysis time varies significantly depending on the performance of your iPhone (product generation). It may take about 5 to 20 seconds. - Wireless (Bluetooth) headphones and headsets are not supported. - The first time the app accesses the built-in microphone and Photos after installation, the iOS system will ask you for permission to access them. If you have not enabled this setting, the application will not be able to access them due to iOS system privacy restrictions. Please enable the access permission in the iOS setting "Settings > Privacy & Security > Photos or Microphone". Please visit our iOS app support page for more information on this app.