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JACK Meterbridge 0.9.2

  Date Added: July 05, 2010  |  Visits: 875

JACK Meterbridge

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JACK Meterbridge is a meterbridge for the UNIX based JACK audio system. It supports a number of different types of meter, rendered using the SDL library and user-editable pixmaps. Supported meters PPM - Peak Program level Meters Approximatly conforming to BS 6840-10. These meters are designed to indicate peak amplitude, as opposed to VU meters which are designed to indicate volume. The scale is correct according to the standard, 4 equates to 0dB, 1 to -12, 7 to +12, and it is linear with decibels. Ive never used a real PPM meter, so I dont know if it reacts correctly. Feedback welcome. VU - Volume Unit meters Conforming to BS 6840-17:1991. Real meter is larger. These meters are designed to measure the "volume" of an audio signal, it is not as relevant to digital systems as PPM meters, but is useful if you are interfacing to analogue tape, FM broadcast equipment or want a general idea of the signal volume. The -r flag (set reference level) is usful with these meters as it will allow you to calibrate to your DA converters. The meter is pre-adjusted so that it should allign correctly calibrated DA converters with analogue systems. If you wish to run with 0dBFS = 0dBu then use "-r 20" DPM - Digital Peak Meter Conforming to IEC 268-18:1995 (peak indiciator decay may not be correct). These are meters as typically seen on digital consoles, HD recorders etc. There are the most efficient in screen realestate and CPU use but look a bit boring. JF - "Jellyfish" Meter (aka. Goniometer) A jellyfish meter is a stereo scope display, it can be used to spot phase and mono compatibility problems. Some charateristic problems can be seen, eg. a signal with a stronger left channel is seen as a shape sloping to the left [], more right slopes to the right [/], and dead mono is a vertical line [|]. The meter below the scope display indicates the degree of stereo correlation between the channels, a value of +1 means that it is perfectly mono compatible, and -1 and that the channels are in anti-phase (so they will cancel out if mixed). If someone has better examples, please mail them to me, there are probably tutorials online. SCO - Scope A rendering of an oscilloscope display. It has a basic trigger function, but there is no timebase control. It renders one pixel per sample, so it will probably be next to useless at 96KHz.

Requirements: No special requirements
Platforms: Linux
Keyword: Audio Jack Meter Meterbridge Meters Multimedia Peak Ppm Unix Volume
Users rating: 0/10

License: Freeware Size: 604.16 KB
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