When I changed the keyboard layout of the digital piano on this page, I removed the hover (color changes when the mouse hovers over a key) and active (color changes when a key is pressed) effects from the white and…
I changed the keyboard layout of the electronic piano on this page. Volume: Current waveform: Sine Square Sawtooth Triangle Custom The main change is to prepare the black keys as the child elements of the white keys in JavaScript that…
The time variation of the sound amplitude after pressing a key on the digital piano on this page has been changed. Although it is different from the sound of a piano, it seems a little closer to the sound of…
I prepared a page for a digital piano using Web Audio API based on this page. This code is just a modification of the sample code. I applied the following modifications: i. added black keys, ii. used a function to…
The frequencies of the notes of the 88 piano keys are tabulated. The sounds with these frequencies are output by the Web Audio API’s OscillatorNode. The frequency of a note doubles in an octave and the frequency of the 12…
I measured the acceleration spectrum of Gifu bus vibration with phyphox (Physical Phone Experiments). The measurement method is the same as this blog which measured the acceleration spectrum of the vibration of a washing machine. Sitting in the right-most seat…
I measured the sound of Web Audio API’s OscillatorNode with phyphox (Physical Phone Experiments). I set four different waveform parameters for the OscillatorNode: sine, square, sawtooth and triangle. All frequencies were set to 440 Hz. Click the buttons below to…
I applied Bootstrap (v5.0.2) to a specific region of WordPress post. 1. When creating a new post for this blog, I selected Text tab in Classic Editor and entered the following text. I pressed the Preview button to check it…
On March 12 (Sat.), 13 (Sun.) and 19 (Sat.), 2022, I walked around Nagara Bridge, Gifu Park, Mt. Kinka and Gifu Castle. I took photos with my smartphone and recorded GPS logs. GPS logs were recorded with phyphox (Physical Phone…
I recorded guitar sounds audio spectra with phyphox(Physical Phone Experiments). 1. I recorded audio spectra of the following acoustic guitar by plucking the 1st and 6th string. 2. I clicked the buttons pointed with the green boxes in the following…
