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Audio & Voice AI

Hot Step Cpp

Hot Step Cpp is a C++ desktop application for generating stereo music locally from a style caption and lyrics. Its GGML-based engine supports ACE-Step 1.5, MiniMax-Music3 and YuE2.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Hot Step Cpp — OpenViST project profile in Audio & Voice AI.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use Hot Step Cpp when you want to generate music from text inputs on your own desktop hardware and choose among its supported local models.

Who it is for

  • People who want to create AI-generated song drafts from their own style descriptions and lyrics.
  • Users who prefer a local music-generation workflow on desktop hardware.
  • Music makers who want to compare supported models or experiment with song styles.

Documented uses

  • Generate stereo music from a style prompt and lyrics.
  • Have Auto-Gen draft a caption, lyrics and title from a selected genre.
  • Create a style-matched cover from a reference track or repaint one region with ACE-Step 1.5.
  • Train style adapters from a folder of songs using the Training Studio.
Before you choose

Requirements & limits

Portable releases are listed for Windows x64, Linux x64 and macOS Apple Silicon, with build variants depending on platform and hardware. The app requires downloading model files; the README lists the ACE-Step 1.5 Quick Start pack at about 9 GB. The project states that generation runs on local hardware without cloud service, API keys or a subscription.

  • Select a build suited to the machine: the README lists CUDA, Vulkan, ROCm or CPU variants across platforms, and Metal for Apple Silicon.
  • The project warns that CPU generation is much slower than generation using a usable GPU.
  • Model Manager handles model downloads, and the first-run Quick Start pack is about 9 GB.
  • Training Studio supports style adapters for all three backends but is described as experimental and GPU-hungry.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Set up Hot Step Cpp and generate a song

Start the local app, download its Quick Start model pack, and generate stereo audio from a style description and lyrics.

Before you start

  • A supported Windows, Linux or macOS build matched to the available hardware.
  • About 9 GB for the ACE-Step 1.5 Quick Start pack.

Steps

  1. Download the archive for your platform and GPU, then extract it into its own folder.

  2. Run HOT-Step.bat on Windows or ./HOT-Step.sh from a terminal on Linux or macOS.

  3. Keep the console window open while using the app in the browser at http://localhost:3001.

  4. In Model Manager, download the Quick Start pack from the ACE-Step 1.5 tab, then click Restart in the sidebar.

  5. In Custom-Gen, enter a style description and lyrics, then click Generate.

Expected outcome

The app generates stereo audio locally from the supplied style description and lyrics.

Guide limitations

  • Closing the console window stops the app.
  • CPU builds are much slower than using a usable GPU.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
13 October 2026
Original website title
scragnog/HOT-Step-CPP · Official homepage title · retained in its source language
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