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Tape Speed Change Pitch and Duration

Online tape speed change pitch and duration. Ideal mathematical audio model with supplied values. Real speakers, rooms, hearing exposure and converter performance are not measured.

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tape speed change pitch and duration calculator online

Use tape speed change pitch and duration online for original duration s, old speed, new speed. Ideal mathematical audio model with supplied values. Real speakers, rooms, hearing exposure and converter performance are not measured.

How to use it

Enter original duration s. Set old speed, new speed. Select Calculate and check the labeled output. Copy or download the JSON result.

Options and example settings

OptionChoices / valueExample default
original duration sMain input. Positive values. 120
old speedOption. Positive values. 7.5
new speedOption. Positive values. 15

Calculation method

new_duration_s = original_duration_s*old_speed/new_speed; pitch_shift_cents = 1200*log2(new_speed/old_speed) (^ means exponentiation; trig functions ending in d use degrees).

Worked examples

Apply tape speed change pitch and duration to the case below, keeping the displayed units and assumptions. Ideal mathematical audio model with supplied values. Real speakers, rooms, hearing exposure and converter performance are not measured.

Tape Speed Change Pitch and Duration — worked case

Settings: old speed: 7.5; new speed: 15

Input:

120

Calculated result for these inputs:

Output:

{
  "new_duration_s": 60,
  "pitch_shift_cents": 1200
}

Choose the right tool

Choose timing tools for tempo and samples, tuning tools for frequency ratios, and level tools for amplitude or power. Coherent signal addition differs from independent-source addition; acoustic room estimates assume simplified conditions.

Limitations and common mistakes

  • Ideal mathematical audio model with supplied values. Real speakers, rooms, hearing exposure and converter performance are not measured.
  • Use the displayed unit in every field. Ratios and percentages are different inputs; percent fields use values such as 25 rather than 0.25.

Frequently asked questions

How can I use tape speed change pitch and duration calculator online?

Enter original duration s. Set old speed, new speed. Select Calculate and check the labeled output. Copy or download the JSON result.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

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