# Pitch Shift Speed Ratio Calculator MCP for AI Agents AI Agent Connect > Pitch Shift Speed Ratio Calculator helps audio producers and DJs figure out the exact math for varispeed adjustments. It calculates the speed multipliers, adjusted durations, and new BPM changes needed to hit a specific pitch without breaking your project's timing or key. ## Overview - **Category:** utilities - **Price:** Free - **Endpoint:** https://edge.vinkius.com/vk_preview_Gvil2nlWeQ3pxDJEsID2B5IB53i5odDwpG4XrplK/ai-agent-connect - **Tags:** audio, pitch-shift, bpm, varispeed, dj-tools, music-theory ## Description The Pitch Shift Speed Ratio Calculator is a specialized utility for audio producers and DJs who need to move beyond guesswork when adjusting audio playback. When you're trying to match the key of two loops or sync a sample to a new tempo, the math can get messy fast. This Connector takes the heavy lifting off your plate by calculating the precise numbers you need for varispeed workflows. Instead of squinting at a calculator or guessing how much to slow down a track, you just tell your agent what result you want. You'll find it's a huge time-saver when using it through the Vinkius catalog, where you can connect your preferred AI client and start working immediately. It handles the conversion between semitones, speed ratios, and BPM so you can focus on the mix. Whether you're trying to find the right ratio to drop a sample into a new key or just need to know how long a clip will be after a speed change, this tool gives you the exact data points you need instantly. ## Tools ### transform_duration Shows you the new length of an audio clip once a speed ratio is applied. This helps with precise arrangement timing. ### get_speed_rate Tells you the exact playback speed multiplier needed to hit a specific semitone shift. Use this when you know your target pitch. ### reverse_semitone_lookup Gives you the number of semitones required to reach a target speed ratio. Use this when you have a specific speed in mind. ### transform_bpm Calculates the new BPM for a musical loop after you apply a speed adjustment. It keeps your tempo accurate. ## Prompt Examples **Prompt:** ``` I have a loop at 124 BPM. If I slow it down to a 0.9 ratio, what's the new BPM? ``` **Response:** ``` The new tempo for your loop will be **111.6 BPM**. Here is the breakdown: - Original BPM: 124 - Speed Ratio: 0.9 - **New BPM: 111.6** You might want to adjust your project grid to match this new speed. ``` **Prompt:** ``` What speed multiplier do I need to shift a sample up by 3 semitones? ``` **Response:** ``` To shift the sample up by **3 semitones**, you'll need a playback speed multiplier of approximately **1.259**. This will maintain the correct pitch relative to your shift while using the varispeed method. ``` **Prompt:** ``` My clip is 60 seconds long. If I use a 1.2 speed ratio, how long will it be? ``` **Response:** ``` At a **1.2 speed ratio**, your 60-second clip will be reduced to **50 seconds**. This is helpful for fitting it into a tighter arrangement without having to manually trim the audio. ``` ## Capabilities ### Get speed multipliers from semitones Determine the exact playback speed needed to hit a specific pitch shift. ### Find semitones from a speed ratio Calculate the number of semitones required to reach a target speed multiplier. ### Calculate new BPM for adjusted loops Find the new tempo of a musical loop after applying a speed change. ### Determine new clip durations See how long an audio clip will be after you apply a specific speed ratio. ### Match audio keys using varispeed math Align two different audio samples by calculating the necessary speed adjustments. ## Use Cases ### Matching a sample's key You have a sample that's 2 semitones off. You ask your agent what speed ratio you need to hit that pitch exactly using `get_speed_rate`. ### Syncing a loop to a new tempo You're moving a 120 BPM loop to 128 BPM. You ask your agent for the duration and speed ratio using `transform_bpm`. ### Calculating archival audio length You need to know how long a 5-minute track will be if you slow it down by 20% for a specific effect using `transform_duration`. ### DJing set prep You have a specific speed ratio you want to use and need to know what the resulting pitch shift will be in semitones using `reverse_semitone_lookup`. ## Benefits - Get exact speed multipliers for pitch changes using `get_speed_rate` so you don't have to guess the math. - Know your new tempo instantly with `transform_bpm` when you change the speed of a loop. - Calculate the precise length of a clip with `transform_duration` before you start your arrangement. - Quickly find the right pitch shift for a ratio using `reverse_semitone_lookup` to keep your samples in key. - Save time on manual math by letting your agent handle all the varispeed conversions for your project. ## How It Works The bottom line is you get the exact math for audio timing and pitch without doing any manual calculations. 1. Provide your agent with your starting audio data like the original BPM or the current clip length. 2. Tell your agent your target goal, such as a specific pitch shift in semitones or a desired playback ratio. 3. Get the exact speed multiplier, new duration, and adjusted BPM for your project. ## Frequently Asked Questions **What is the Pitch Shift Speed Ratio Calculator for?** It's a math tool for audio producers. It calculates the exact speed, duration, and BPM changes needed when you shift the pitch of a sample. **Can I use this to change the pitch of an actual audio file?** No, this Connector doesn't process audio. It gives you the numbers you need to put into your DAW or hardware to achieve the result. **How does this help with DJing?** It helps you figure out the exact playback speed needed to match the key of two different tracks without having to do the math in your head. **Will it tell me the new BPM of my loop?** Yes, if you provide the original BPM and the speed ratio, it will tell you the new tempo instantly. **Can it calculate how long a song will be if I slow it down?** Yes, it takes your original length and the speed ratio to give you the new total duration in seconds. **Is this for music theory?** It's a practical tool for music theory. It helps you see the relationship between semitones, speed ratios, and time. **What is the varispeed method?** The varispeed method involves changing the playback speed of an audio file to alter its pitch. This process naturally changes both the tempo (BPM) and the duration of the clip. **How can I find the speed multiplier for a specific semitone shift?** You can use the `get_speed_rate` tool. Simply provide the number of semitones you want to shift (positive for higher pitch, negative for lower), and it will return the required ratio. **Can I calculate the new BPM after a speed change?** Yes, use the `transform_bpm` tool. By providing your original BPM and the playback ratio, you will get the new tempo.