Logt Audio - The Power Amplifier

The basic design of a power amplifier consists of an input stage, which performs the voltage gain and a current gain stage.

The amplifier input is coupled to the voltage gain stage through a DC blocking capacitor, which in combination with an input load resistor forms a high pass filter with low cut-off frequency. To limit the bandwidth of the amplifier, a low pass RC filter is also added。。。

www.logtaudio.nl

Logt Audio - Hearing and Psychoacoustics

Psychoacoustics - Timbre and Pitch

The smallest degree of pitch discrimination between two pitches depends on their intensity and frequency range. Under the best conditions, a person with good hearing can discriminate about 1400 different pitches, of which 120 are used in the western scale of equal temperament. The lowest pitch corresponds to the lowest frequency giving a sensation of, around 20 to 30 Hz. The highest pitch depends on the highest audible frequency, which varies with age and especially noise exposure, but lies generally in the range of 15 to 20 kHz with younger people. ...

MP3 engineering and psychoacoustics

MP3 is something to give a certain amount of attention. MP3 is especially to be used for portable systems or internet applications. The source material is compressed by stripping audible musical information in order to decrease the required data storage capacity. At reproduction the data is decompressed for further processing. Besides the bitrate used for sampling the data, psychoacoustic models are used to reduce the redundant information in music. The current codecs for MP3 use such optimized algorithms that only strips those sounds that are otherwise also not audible...

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Coyle & Sharpe - Audio Visionaries

Coyle & Sharpe- Audio Visionaries

(Street Pranks And Put-Ons)
(2000, Thirsty Ear)

James P. Coyle and Mal Sharpe called these man-on-the-street interviews "terrorizations." Armed with the Mohawk, a steel tape recorder measuring approximately 3" X 12" hidden in a briefcase with a small hole cut out the top, Coyle and Sharpe wandered San Francisco...

Prank Francisco

THX Le Garage Hermetique

Chile Museo precolombino / Archivo Audiovisual

Chile Musica y Voces Nativas

Museo precolombino

Archivo Audiovisual

Escuchar y descargar música de los pueblos originarios de Chile, de instrumentos precolombinos de la colección del Museo y de música contemporánea de inspiración americana.

disco de oro Voyager I

http://goldenrecord.org/sounds.htm

Link al disco enviado al espacio exterior en la sonda Voyager I, 1977. Carl Sagan trabajó en el equipo que decidió que material incluir, imagenes y sonidos en microsurco.
Se puede escuchar las grabaciones de lenguajes y musica terrestres.
Hay que clickear en el ícono del disquito en el medio de la fotito de la sonda.
Asi que cuendo lleguen los marcianos alguno ya va a ser fana del blues.

Haruomi Hosono & Namco Soundstaff

Namco Video Game Music

WFMU AUDIO MYSTERIES

WFMU AUDIO MYSTERIES





Reel Catacombs Exploration, Interviews, Rear Outtakes and mooooooreeeeee.......

Online survey textural sounds

En el link

http://grrrr.org/test/texvis/

pueden participar de una encuesta que tiene como fin desarrollar un mapeo ente texturas visuales y sonoras, llevado adelante por el Instituto austriaco de Inteligencia artificial (OFAI).

esta es mi "contribucion" bautismal a la oreja extraña.

por supuesto que toda asociacion entre sonido e imagen tiene ami criterio una base cultural, por lo que no veo demasiada utilidad en la encuesta, aunque quizas la complete.

Como dato interesante para situar una comparacion entre el espectro visual y el auditivo, mientras cubrimos un aproximado de 10 octavas mediante el oido (20-20 Kilohertz) solo vemos tres cuarto de octava (450-750 Terahertz).

Y resolvemos de manera mucho mas fina esa porción de octava en colores que las diez octavas en alturas.

Swoshes using Air Pressure Samples & GRM

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