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Text

The Text meter uses numbers to display audio analysis values

Text meters are open canvases for any number of traces to display audio analysis values. Additional design elements, such as labels, lines, and frames are available to add clarity and beauty to the layout. There are 7 different kinds of fundamental trace types that can display an enormous range of information about the audio.
Controls | Adding Elements | Modifying Elements
Element types: Labels | Frames | Traces
Trace Element types: Magnitude | Loudness | LEQ | Clip | SPL | THD | Pitch

Controls

Hover the mouse over the meter to reveal the control bar.
Show the list of elements you can add to the meter
Pause the meter
Run the meter
Reset the meter values

Add Elements

  • Lists over 20 types of element presets available to add to the meter
  • To add an element, simply drag one from this list onto the meter
  • Double-click to add an element to the center of the meter

Selecting and Moving Elements

  • Hover the mouse over an element to reveal the button
  • Click an element to select it
  • Shift- or Command-click an element to select it without deselecting others
  • Drag around elements to select multiples at once
  • The selection rectangles will temporarily hide when the mouse is not hovering over the meter
  • Drag an element to change its position
  • Dragging one of many selected items will move all of the selected items
  • Control-click on multiple selected elements to align them

Label Element

A label element is an arbitrary piece of text that you can use to identify a value, a channel, a unit, or whatever you like.
  • Double-click to select the text for editing
  • The label will automatically resize to fit the text as you type
  • Click the button to edit the size, weight, and color

Frame Element

A frame element is a rectangle that can be used to frame groups of traces, create divider lines, or otherwise visually separate items in a meter.
  • Hover over the frame when it is selected to reveal the sizing handles
  • Double-click or click the button to edit the fill color and border width, color and corner radius.

Trace Element

A trace element presents the results of an analysis of an audio stream.
  • Hover over the frame when it is selected to reveal the sizing handle on the left
  • By default, all trace elements are justified right in order to keep the digits lined up
  • The height is automatically determined by the text size, the width is user-controllable
  • Double-click or click the button to edit the trace settings.

Magnitude Trace

  • Shows the magnitude of a signal compared to a reference value
  • Supports different reference measurements, so you can see the difference between two live measurements (Peak vs. TruePeak, for example)
Useful For...
Visualizing standard magnitude calculations as numbers.
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Source

  1. The audio inputs to combine.
  2. The method used to combine the channels.
    • Sum: adds the samples together
    • Difference: even numbered channels are subtracted from odd numbered channels
    • Average: the samples are added together and divided by the number of channels
    • Average Difference: even numbered channels are subtracted from odd numbered channels and the result is divided by the number of channels
  3. The amount of gain to be added to the combined result.
  4. The mathematical algorithm to use to quantify the set of audio samples.
    • Peak: The maximum magnitude
    • TruePeak: The maximum magnitude after a high-definition upsampling
    • RMS: The root-mean-square
    • AES-17: The root-mean-square value + 3dB
    • Average: The mean
  5. The mathematical value or algorithm to be used to determine the reference value. For most measurements this is Full Scale. For example, Crest and Form Factor use different reference values.
  6. The response rise and fall time.
  7.   Rise Time Hold Time Fall Time
    Digital 9.5dB in 1.7ms none 20dB in 850ms
    PPM Type I 9.5dB in 1.7ms none 20dB in 1.7s
    PPM Type II 9.5dB in 1.7ms 100ms 24dB in 2.8s
    VU 40dB in 300ms none 40dB in 300ms
    Nordic 14dB in 5ms none 20dB in 1.5s
    BBC/EBU 14dB in 5ms none 24dB in 2.85s
    Peak Hold (Short) immediate 0.7s 60dB in 300ms
    Peak Hold (Long) immediate 2.0s 60dB in 300ms
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Text

  1. The size of the text in points.
  2. The weight (or width) of the text.
  3. The alignment of the text inside its text box.
  4. The number format used to display the value.
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Color

  1. The color of the text when the value is above the threshold.
  2. The value of the trace that separates between two different colors.
  3. The color of the text when the value is below the threshold.

Loudness Trace

  • Given specific channel inputs, applies a specialized algorithm to determine a value
  • The algorithm in use and the response depends on the selected measurement
  • Results are in LU
Useful For...
Determining the Program Loudness, a standard across the industry.
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Source

  1. The audio input that contains the left channel content.
  2. The audio input that contains the right channel content.
  3. The audio input that contains the center channel content.
  4. The audio input that contains the left surround channel content.
  5. The audio input that contains the right surround channel content.
  6. The time scale for the program loudness measurement
    • Momentary: a non-gated time window of 0.4s
    • Short-Term: a non-gated time window of 3.0s
    • Integrated: the gated accumulated value
    • Range: the loudness range value
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Text

  1. The size of the text in points.
  2. The weight (or width) of the text.
  3. The alignment of the text inside its text box.
  4. The number format used to display the value.
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Color

  1. The color of the text when the value is above the threshold.
  2. The value of the trace that separates between two different colors.
  3. The color of the text when the value is below the threshold.

LEQ Trace

  • Given one or more audio inputs, accumulates audio over time
  • Applies a filter and combines them into a single audio signal
  • Calculates a value from the set of samples
  • Calculates the average since the meter was started or reset
  • Displays the average value
Useful For...
Determining the ”energy” of audio over time.
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Source

  1. Select the channels to use for the input
  2. Select the filter to apply for measurement
  3. Set the length of the audio to be analyzed at once
    • Extra Short: 250ms
    • Short: 500ms
    • Medium: 1s
    • Long: 3s
    • Extra Long: 10s
  4. Set the gain to be applied
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Text

  1. The size of the text in points.
  2. The weight (or width) of the text.
  3. The alignment of the text inside its text box.
  4. The number format used to display the value.
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Color

  1. The color of the text when the value is above the threshold.
  2. The value of the trace that separates between two different colors.
  3. The color of the text when the value is below the threshold.

Clip Trace

  • Given one or more audio inputs, counts the number of times a sample magnitude crosses a threshold.
Useful For...
Confirming if signals will cause distortions in some playback systems.
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Source

  1. The audio inputs to combine.
  2. The method used to combine the channels.
    • Sum: adds the samples together
    • Difference: even numbered channels are subtracted from odd numbered channels
    • Average: the samples are added together and divided by the number of channels
    • Average Difference: even numbered channels are subtracted from odd numbered channels and the result is divided by the number of channels
  3. The amount of gain to be added to the combined result.
  4. The method used for counting
    • Clip Count: The number of samples that have clipped.
    • Clip Incident Count: The number of times a group of samples has clipped.
    • Largest Clip Run: The maximum number of samples that are in a group of samples that has clipped.
  5. Use the TruePeak oversampling algorithm to count clips.
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Define

  1. The number of consecutive samples necessary to be considered a clip.
  2. Select whether the sample value should be greater than or greater than/equal to the threshold.
  3. The threshold where a sample is considered a potential clip.
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Text

  1. The size of the text in points.
  2. The weight (or width) of the text.
  3. The alignment of the text inside its text box.
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Color

  1. The color of the text when the value is above the threshold.
  2. The value of the trace that separates between two different colors.
  3. The color of the text when the value is below the threshold.

SPL Trace

  • Measures the Sound Pressure Level with respect to the threshold of human hearing
  • Applies any one of the standard weighting filters
  • Calibration is important! : Be sure to calibrate your microphone with a microphone calibrator before depending on the results
Useful For...
Measuring the real-time acoustic level of a sound
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Source

  1. The audio input to measure.
  2. Set any gain to be applied for calibration purposes.
  3. Select the standard weighting filter to apply.
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Text

  1. The size of the text in points.
  2. The weight (or width) of the text.
  3. The alignment of the text inside its text box.
  4. The number format used to display the value.
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Color

  1. The color of the text when the value is above the threshold.
  2. The value of the trace that separates between two different colors.
  3. The color of the text when the value is below the threshold.

THD Trace

  • Measures the Total Harmonic Distortion in a signal
  • It is expected that an external sine wave is passed through a system for measurement.
Useful For...
Measuring the reproduction accuracy of a system.
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Source

  1. The audio input to measure.
  2. The algorithm to use to determine the harmonic distortion value.
  3. Set the length of the preceding results to include in the displayed results.
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Text

  1. The size of the text in points.
  2. The weight (or width) of the text.
  3. The alignment of the text inside its text box.
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Color

  1. The color of the text when the value is above the threshold.
  2. The value of the trace that separates between two different colors.
  3. The color of the text when the value is below the threshold.

Pitch Trace

  • Determines a single musical pitch of an audio input.
  • Much like a musical instrument tuner, with similar responses.
  • Shows the result with the musical note, octave, and cents optionally.
Useful For...
Tuning musical instruments.
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Source

  1. The audio inputs to combine.
  2. The method used to combine the channels.
    • Sum: adds the samples together
    • Difference: even numbered channels are subtracted from odd numbered channels
    • Average: the samples are added together and divided by the number of channels
    • Average Difference: even numbered channels are subtracted from odd numbered channels and the result is divided by the number of channels
  3. The amount of gain to be added to the combined result.
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Text

  1. The size of the text in points.
  2. The weight (or width) of the text.
  3. The alignment of the text inside its text box.
  4. The color of the text.
  5. Display the note letter.
  6. Display the octave number in the MIDI scale.
  7. Select the format, if any, to display the offset from a quantized semitone in cents.