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এই নিয়ন্ত্রণ পরিবর্তন করলে এই পেজটি স্বয়ংক্রিয়ভাবে আপডেট হবে

Set the sample rate of a project in Logic Pro for Mac

When working with digital audio, a key concept is the sample rate (the number of times an analog audio signal is sampled per second when being converted to a digital audio signal). Higher sample rates generally produce higher-quality (higher-fidelity) digital audio files.

For best results, the sample rate of audio files in a project should match the sample rate of the project itself. A mismatch in sample rates between an audio file and the project can result in the audio file playing back at a different pitch. To have Logic Pro automatically convert the sample rate of audio files to match the project sample rate, go to File > Project Settings > Assets, and select the “Convert audio file sample rate when importing” checkbox. You can also convert the sample rate of audio files to the project sample rate in the Project Audio Browser.

The higher the sample rate used, the higher the audio quality, and also the more audio processing power is required when working on the project. The CD standard uses the rate of 44.1 kHz, while video formats commonly use 48 kHz. Modern recordings can use rates of 96 kHz up to 192 kHz.

Important: If you change the project sample rate, any audio files in the project may no longer match the project sample rate, and may not play back correctly. In general, don’t change the project sample rate after you have recorded or added audio files in your project.

Set the project sample rate

In Logic Pro, do one of the following:

  • Choose File > Project Settings > Audio (or use the Open Audio Project Settings key command), then choose a sample rate from the Sample Rate pop-up menu.

  • Click the Sample Rate display in the Display, then choose a sample rate from the pop-up menu.

    Note: If the Sample Rate does not appear in the Display, Control-click the control bar and choose Customize Control Bar from the shortcut menu. In the Display column, choose Custom (if it is not already chosen), then select the Sample Rate/Buffer Size checkbox.

    Figure. Sample Rate display in the control bar.

Match a file’s sample rate with the project sample rate

  • In Logic Pro, use the Project Audio Browser’s Copy/Convert File(s) command (which is also available by Control-clicking the Project Audio Browser or using the corresponding key command), then replace the file in the project.

Logic Pro performs a real-time, native sample rate conversion. Any sample rate available in Logic Pro (via Audio > Sample Rate) can be used for the conversion—even if your audio hardware doesn’t support the selected sample rate.

The native software sample rate conversion function matches the sample rate of any audio hardware, thereby allowing the playback of projects on virtually any audio system, even if the hardware is—in sample rate terms—not compatible. Nothing is lost in the process. Any internal processing and bouncing is always performed at the original sample rate, and at the highest quality, even in cases where the hardware doesn’t support a particular sample rate. This feature allows you to work on projects originally created on high-end audio systems, with lower-end setups.

For example, imagine a project was created with audio hardware set to operate at 96 kHz. Moving this project to another computer (for example, a notebook computer) that doesn’t support the original project’s sample rate will result in the wrong playback speed. The native real-time sample rate conversion function will counteract this effect, allowing correct playback of the project on the portable computer, at any sample rate.

Note: Higher sample rates not only use up more disk space, but also require more processing.

Download the guides:

Logic Pro User Guide: PDF

Logic Pro Instruments: PDF

Logic Pro Effects: PDF

Control Surfaces Support Guide: PDF

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