Online Multichannel Peakmeter Using AudioWorklet


hydrogenaud.io/index.php/topic,126685

Digital Peak Programme Meter


Under-reads very short peaks slightly like a traditional BBC PPM. Fallback ballistics are accurately modelled but the attack time (eg the BBC spec of 2.5dB down for a 10ms burst of 5Khz) is only approximate. Very short peaks such as 1.5ms register -4dB instead of -9dB as per spec. The fallback time from 1 to 7 is in line with BBC specifications, 2.5 to 3 seconds. You may prefer a faster fallback, especially as there are the peak markers, so the fallback time can be adjusted by means of an arbitrary value entered on the options page. A value of 2 corresponds to the BBC PPM spec. Values up to 10 speed up the decay.

Mono matrix can be set to M = (A+B) – 3dB or 6dB. Traditionally the BBC have used M3, though M6 is increasingly used. Channels can be labelled L & R or A & B. Displays Left, Right, Mono (sum) and Stereo (difference) simultaneously.

The peak markers can be set to hold the peak. Click on the window to reset.

There is also a 20dB button. This increases the gain of of the Stereo difference indication  by 20dB (10 times). M, L & R are not affected.

The colour of each bar can be set to any colour from the options screen. By default all bars are green but it possible to have, for example, red and green for A and B.

For Windows XP, Vista, 7 or 8.

www.darkwooddesigns.co.uk/pc2/meters.html#Peak

Digital Level Meter ~ 0.1 dB Resolution Readout


With 0.1dB resolution readout, ideal for accurate steady state measurements or for reading peaks however short.

For Windows XP, Vista, 7 or above.   Requires WDM drivers, does not support ASIO.

The button to the left of the readout switches the digital readout to follow the maximum peak markers or the instantaneous ‘live’ peaks. In conjunction with the peak hold feature this enables transient peaks to be read accurately.

Zero is referenced to Full Scale Digital, although this can be modified with the calibration adjustment to provide some headroom as required.

Sample rate can be set to match recording if necessary.

Infinite peak hold setting if required, even across program restarts. Reset by double-clicking meter display.

If you need to run multiple meters monitoring more than one source there is a Multi-Channel Level Meter for up to 24 channels.

www.darkwooddesigns.co.uk/pc2/meters.html#Digital

foo_loudness_peakmeter ~ Measure & Visualise Loudness & Sample Peaks


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Foobar2000:Components/Loudness_Peakmeter_(foo_loudness_peakmeter)
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TDR Kotelnikov ~ Wideband Dynamics Processor


TDR Kotelnikov is a wideband dynamics processor combining high fidelity dynamic range control with deep musical flexibility. As a descendant of the venerable TDR Feedback Compressor product family, Kotelnikov has directly inherited several unique features such as a proven control scheme, individual release control for peak and RMS content, an intuitive user interface, and powerful, state of the art, high-precision algorithms.

With a sonic signature best described as “stealthy”, Kotelnikov has the ability to manipulate the dynamic range by dramatic amounts, while carefully preserving the original tone, timbre and punch of a musical signal. As such, it is perfectly suited to stereo bus compression as well as other critical applications.

The concept is “proudly digital” in the sense that it doesn’t try to emulate any previously existing device. This is the original!

Features:

  • 64bit multi-rate processing structure for highest accuracy
  • “Delta” oversampled signal path (bit transparent at 0dB gain reduction)
  • Super fast, yet natural sounding compression
  • “Crest factor” based control scheme offering independent release controls for peak and RMS events
  • Flexible sidechain highpass filter
  • Advanced stereo linking options optimized for the stereo bus
  • Delta preview mode previews the difference between compressed and original signal
  • Latency compensated, click free bypass (i.e. processing never interrupted)
  • User interface rescaling (100%, 125%, 150%)

www.tokyodawn.net/tdr-kotelnikov

Accessible Peak Meter ~ Realtime Sonification


Accessible Peak Meter uses real-time sonification to deliver information to the user about audio levels and peaks in audio signals, and so supports core activities in audio production. Accessible Peak Meter 3 is an extended development of Accessible Peak Meter. It adds more meter modes (RMS, EBU, VU/PPM, Truepeak, Dialnorm and Dynamic Range).

Accessible Peak Meter was developed in 2014/2015 at Queen Mary University of London as part of the Design Patterns for Inclusive Collaboration research project ( depic.eecs.qmul.ac.uk ).

More information about Accessible Peak Meter can be found at depic.eecs.qmul.ac.uk/apm

USAGE
The plug-in comes with the following tweakable parameters:

  1. Sonification Type: to switch between continuous mode , clipping mode and clip tone mode. “Clip tone” sonficates as soon level is above threshold .
  2. Dry: controls the level of the input audio, namely the audio content you want to analyze;
  3. Wet: controls the level of the sonification;
  4. Tone: controls height of the sonification tone in clip tone mode;
  5. Threshold: sets the threshold for the clipping mode, it has no effect on the continous mode
  6. Decay: this only affects the continuous mode sonification. The value ranges from 1 second down to 0.05 seconds. This is the time the meter would take to decay from 0 db to -inf after an impulse. These numbers don’t give a real feeling of how the sonification will sound – it is easier to think that when set to 0.05 the sonification will stop pretty immediately when you stop the audio; whereas if the value is set to 1, it will take longer to decay. In general, though, the latter sounds cleaner and normally the audio level doesn’t go all the way down to silence, as during the decay it encounters other peaks that bring it back up. So it’s up to you to find the right trade off.
  7. DAW sync: if set to “on”, meter reset is synced with DAW start playing. Only applicable for program loudness modes like RMS/EBU/DialNorm IL and PLR
  8. Meter Mode: sets the meter modes. Please to note that all meter modes are calibrated to 0 dBFS, 0 dBTP, 0 LUFS, 0LKFS, 0 VUFS and 0 PPMFS
    1. Peak: same as AccessiblePeakMeter, dBFS
    2. TruePeak: based on ITU BS1770.4, dBTP  
    3. VU: peak meter, 300ms integration time, VUFS
    4. PPM: peak meter, target, PPMFS
    5. RMS: 600ms integration time, AES-17, dBFS 
    6. EBU: EBU R128, target level -23 LUFS, LUFS
    7. DialNorm: gated, target level -24 LKFS, LKFS
    8. DR: PLR/PSR, dB

The AccessiblePeakMeter3 provides access to the parameters by exposing them to inspectors – such as ReaAccess plug-in or the Cakewalk Sonar inspector – in a clear and well formatted way.

www.tbproaudio.de/products/accessiblemeters

MAnalyzer ~ Spectral Analyzer & Sonogram


MAnalyzer is an advanced spectral analyzer and sonogram containing unique features such as smoothing, normalization, super-resolution, prefiltering and deharmonization. The included meters provide a peak meter and EBU R128 and ITU-R BS 1770-3 compliant loudness meter.

MAnalyzer00.v1

www.meldaproduction.com/MAnalyzer

FreeG ~ Fader Plug-in


The Sonalksis FreeG is everything you need in a master fader. A simple, but absolutely indispensable plug-in, FreeG extends the functionality of a typical audio host by providing a large-format style fader, along with ultra accurate metering. FreeG helps to maximise workflow with extended, customizable metering, and multiple control features and settings.

When working with digital audio, a lack of fine metering and extended signal flow control in the host is a common issue. FreeG helps to improve workflow in the host by providing these features in the insert chain. By delivering enhanced control of amplitude, phase and pan (stereo version) in the insert chain as well as fine metering, with user configurable industry standard ballistic options, the freeG is the perfect master control.

Features:

  • Long-throw fader
  • Ultra accurate metering
  • Multiple metering ballistic types
  • Peak and RMS readouts
  • Pre/Post metering options
  • Selectable Pan-Law
  • ‘Fine’ mode for sensitive calibration of the master fader
  • Mono-compatible for use in tracking situations
  • VST and Audio Unit (32 and 64 bit)
FreeG

www.sonalksis.com/freeg