Standard digital audio playing at an accelerated speed forces sound waves to compress. Shorter wavelengths increase the overall audio frequency. This results in artificial, high-pitched voices.
Look for the checkbox and ensure it is checked.
In the left-hand sidebar of the Options window, click on . Under the Playback tree, click on Output .
Audio and video go out of sync at high speeds. Solution: This usually happens with variable frame rate (VFR) videos (common with screen recordings). Remux the file as constant frame rate (CFR) using MKVToolNix or HandBrake . Or, use the "Resample audio to match video" option in Audio Switcher without the external renderer.
In rare cases, changing the playback speed can cause the audio and video to fall slightly out of sync. MPC-HC provides a way to manually correct this. While your video is playing, use the keyboard shortcuts to delay or advance the audio track in small, millisecond increments, manually correcting any sync issues that arise. mpc hc speed up without pitch
: Go to Playback in the options menu. Change the Speed step from "Auto" (which often jumps by 2x) to a custom value like 10% (0.1) or 5% (0.05) for smoother transitions.
To install and enable it:
Most free players use low-quality "linear" interpolation. MPC-HC, however, offers professional-grade algorithms.
Change it to a specific percentage, such as , 5% , or 10% . This allows you to increase speed in smaller increments (e.g., 1.1x, 1.2x) while maintaining pitch. Useful Shortcuts Speed Up : Ctrl + Up Arrow Slow Down : Ctrl + Down Arrow Reset to Normal Speed : Ctrl + R Standard digital audio playing at an accelerated speed
Click , select LAV Audio Decoder , and set it to Prefer .
Check the box for (sometimes labeled as Time Stretch ). Click Apply and then OK . Method 2: Configure the Audio Switcher Filter
Here are some common issues you may encounter when speeding up video playback in MPC HC, along with their solutions:
Go to your LAV Audio Decoder settings and disable bitstreaming for formats like Dolby Digital (AC3), DTS, and TrueHD. This forces MPC-HC to decode the audio internally, allowing the time-stretch filter to do its job before sending a standard PCM signal to your speakers. The Options Grayed Out Look for the checkbox and ensure it is checked
In the same left-hand sidebar of the Options window, look directly under and click on Internal Audio Renderer .
Let's say you have a 2-hour lecture. Here is the optimal configuration for maximum clarity at double speed:
When you accelerate video playback, the audio frequencies naturally compress. This compression raises the pitch and distorts human voices. Fortunately, MPC-HC includes built-in audio processing tools designed to fix this exact issue. By enabling time-stretching, you can speed up your media while keeping voices sounding natural, deep, and perfectly normal.