A pedalboard (also called a pedal keyboard, pedal clavier, or, with electronic instruments, a bass pedalboard) is a keyboard played with the feet that is usually used to produce the low-pitched bass line of a piece of music. A pedalboard has long, narrow lever-style keys laid out in the same semitone scalar pattern as a manual keyboard, with longer keys for C, D, E, F, G, A and B, and shorter, raised keys for C♯, D♯, F♯, G♯ and A♯. Training in pedal technique is part of standard organ pedagogy in church music and art music. Pedalboards are found at the base of the console of most pipe organs, pedal pianos, theatre organs, and electronic organs. Standalone pedalboards such as the 1970s-era Moog Taurus bass pedals are occasionally used in progressive rock and fusion music. In the 21st century, MIDI pedalboard controllers are used with synthesizers, electronic Hammond-style organs, and with digital pipe organs. Pedalboards are also used with pedal pianos and with some harpsichords, clavichords, and carillons (church bells...

Ola leaf is a palm leaf used for writing in traditional palm-leaf manuscripts and in fortunetelling (horoscopes) in Southern India and Sri Lanka. The leaves are from the talipot tree, a type of palm, and fortunes are written on them and read by fortune tellers. It is believed that three thousand years ago the seven rishis, sages, wrote everyone's fortunes on the leaves. The National Library of Sri Lanka holds an ola-leaf manuscript collection.Sinhala letters are round-shaped and are written from left to right. They are the most circular-shaped script found in the Indic scripts. The evolution of the script to the present shapes may have taken place due to writing on ola leaves. Unlike chiseling on a rock, writing on palm leaves has to be more round-shaped to avoid the stylus ripping the Palm leaf while writing on it. When drawing vertical or horizontal straight lines on Ola leaf, the leaves would have been ripped and this also may have influenced Sinhala not to have a period or full stop. Instead a stylistic stop which was known as ‘Kundaliya’ is used. Period and commas were later introduced into Sinhala script after the introduction of paper due to the influence of...

macOS Sonoma (version 14) is the upcoming major release of macOS, Apple's operating system for Mac computers. The successor to macOS Ventura, it was announced at Apple's Worldwide Developers Conference (WWDC) 2023 on June 5, 2023, and is expected to be released in late 2023; the first developer beta was released on June 5, 2023, and entered public beta on July 11, 2023. It is named after the wine region located in California's Sonoma County. New features macOS Sonoma ships a number of new features and improvements, mainly focused on productivity and creativity: Widgets have been completely revamped, they are no longer constrained to the Notification Center—instead they can be placed anywhere on the desktop, and the widget picker has been redesigned to resemble the iPadOS version of it. The lock screen has been changed to have the date and time similar to iOS and iPadOS. Video-conferencing apps can overlay the presenter's webcam video on top of screen sharing. App icons and the...