diff --git a/PROMPTS.md b/PROMPTS.md
index d4219a60..56de868c 100644
--- a/PROMPTS.md
+++ b/PROMPTS.md
@@ -118759,3 +118759,25 @@ Example:
 
 </details>
 
+<details>
+<summary><strong>MDCT Step-by-Step Calculation</strong></summary>
+
+## MDCT Step-by-Step Calculation
+
+Contributed by [@mvel20342@gmail.com](https://github.com/mvel20342@gmail.com)
+
+```md
+Implement MDCT for the input sequence:
+
+x(n) = [1, 2, 3, 4]
+
+Steps:
+1. Identify N and 2N
+2. Apply MDCT formula
+3. Show cosine values clearly
+4. Display step-by-step calculation table
+5. Give final coefficients
+```
+
+</details>
+
diff --git a/prompts.csv b/prompts.csv
index 641f7b87..b2787f6a 100644
--- a/prompts.csv
+++ b/prompts.csv
@@ -98569,3 +98569,13 @@ Variables:
 
 Example:
 - Generate a list of 5 domain names, each with a maximum of ${maxLength} letters, available on ${platform}.",FALSE,STRUCTURED,amvicioushecs
+MDCT Step-by-Step Calculation,"Implement MDCT for the input sequence:
+
+x(n) = [1, 2, 3, 4]
+
+Steps:
+1. Identify N and 2N
+2. Apply MDCT formula
+3. Show cosine values clearly
+4. Display step-by-step calculation table
+5. Give final coefficients",FALSE,TEXT,mvel20342@gmail.com