MPC-HC preserves pitch by applying time-stretching (audio resampling/time-domain or phase-vocoder algorithms) to keep the original pitch while changing playback rate.
If you try to speed up video significantly (e.g., 1.5x or 2.0x speed) using the basic settings, the audio might start to stutter, echo, or distort. To get high-quality, pitch-corrected audio at higher speeds, you need to adjust the internal audio switcher settings.
SoundTouch is an open-source audio processing library specifically designed to change the tempo of audio without altering the pitch. Once this is selected, MPC-HC can handle speeds up to 2.0x with clear, understandable audio.
To reliably preserve pitch at higher speeds, use external audio processing filters or system-level resamplers. Key options: mpc hc speed up without pitch
4.1. LAV Filters (LAV Audio)
4.2. DMO/DirectSound/Wasapi + Audio Processing Objects (APOs)
4.3. Virtual Audio Cable + Dedicated Time-Stretch App this changes the key. For dialogue
4.4. External Players / Plugins
To understand why MPC-HC is special, you first need to understand the problem. When you play audio back faster, the frequency (pitch) rises. To play a 1kHz tone at 2x speed, you are effectively playing a 2kHz tone. For music, this changes the key. For dialogue, it turns baritones into sopranos.
To solve this, players use time-stretching algorithms (also known as pitch scaling). These algorithms chop the audio into tiny windows, overlap them, and cross-fade them to maintain the original frequency while reducing the duration. you can use the menu controls:
Most free players use low-quality "linear" interpolation. MPC-HC, however, offers professional-grade algorithms.
If you want precise control over the playback speed (for example, setting it to exactly 1.25x rather than jumping by large increments), you can use the menu controls:
