
Completed
Posted
Paid on delivery
I need a small command-line utility written in C# that takes a single WAV file and returns a studio-quality cover version. The core functions must include pitch shifting, tempo adjustment and vocal isolation while preserving a warm, natural-sounding voice in the final mix. Your code should compile under the latest stable .NET release and run cross-platform via dotnet run. Feel free to leverage proven audio libraries such as NAudio, SoundTouch or any other open-source DSP toolset, as long as licensing remains clean for commercial use. Deliverables: • Complete, well-structured C# source code and a compiled executable • Clear CLI syntax (e.g., ‑-input, ‑-pitch, ‑-tempo, ‑-isolate-vocals, ‑-output) with basic help text • Read-me explaining build steps, dependency setup and usage examples • A quick demonstration clip that proves pitch/tempo shifts and vocal removal all work without audible artefacts I’ll handle testing on my end; please include brief unit tests or a simple verification method so I can reproduce your results. Looking forward to a clean, efficient solution that turns WAV files into polished covers with minimal fuss.
Project ID: 40464671
16 proposals
Remote project
Active 6 days ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs

Hello, I'm a C# developer with a research background in computational signal processing and can deliver this CLI utility cleanly within a week. Pitch shifting & tempo adjustment: [login to view URL] (proven, MIT-licensed, decouples pitch from tempo via WSOLA) Vocal isolation: center-channel extraction via mid/side processing for stereo sources, with optional spectral masking fallback for mono inputs I/O & resampling: NAudio for WAV read/write and format normalization CLI: [login to view URL] for clean --input, --pitch, --tempo, --isolate-vocals, --output syntax with --help Deliverables you'll get: Cross-platform .NET 8 source compiling under dotnet run on Windows/Linux/macOS Single-file published executable xUnit tests covering pitch/tempo correctness (FFT bin verification) and a reproducible verification script you can run on your end README with build steps, dependency notes, and example commands Short demo clip showing all three transforms on a sample WAV Bid: $50 USD, 6 days. Happy to adjust scope — e.g., add a Demucs/Spleeter ONNX path for higher-quality vocal isolation if you'd like that as a stretch goal. Best, Mohammad
$50 USD in 7 days
0.0
0.0
16 freelancers are bidding on average $170 USD for this job

Hello Sir/MAM I am a skilled full stack developer. Having rich experience in Java , C++ , C , C# , Python , Eclipse , Sql , Mysql , .Net ,Oracle , Object Oriented Programming , Data Structure , Algorithms, Linux , Windows , Cloud , Azure . I have a perfect grip on “Artificial Intelligence” “Automation” , and work in “Machine Learning” Deep Learning ”. My track record as demonstrated in my 100% job completion and 5-star review rating showcases My ability to deliver exceptional results on time and with utmost quality I believe that my skill set makes me the ideal candidate for this project Please come on chat we will discuss more about this I will be waiting for your reply . Thanks and Best Regards
$140 USD in 2 days
6.2
6.2

Hi, I have carefully reviewed your project requirements for a C# command-line utility that processes WAV files to generate studio-quality cover versions. With solid experience in audio processing and .NET development, I am confident in delivering a clean and efficient solution that includes pitch shifting, tempo adjustment, and vocal isolation while preserving a natural and warm voice quality in the output. I will leverage proven DSP libraries like NAudio and SoundTouch to ensure high-quality audio manipulation and cross-platform compatibility under the latest stable .NET release. The tool will feature clear CLI commands (--input, --pitch, --tempo, --isolate-vocals, --output) along with a helpful guide, well-structured source code, and a demonstration audio clip proving the functionality. Additionally, I will include unit tests to allow you to verify the results seamlessly. I propose to deliver this within 7 days for thorough development and testing. Please let me know if you have any preferences on pitch or tempo range parameters or extra features you envision in the tool. Do you have specific pitch shift and tempo adjustment ranges or limits in mind for the utility? Best regards,
$155 USD in 29 days
5.1
5.1

I am very interested in applying for your job since it seems to fit very will with my experience and skills. Regards SamirBanna
$200 USD in 3 days
4.7
4.7

Hello, I am available now. I have read your project description carefully and I understand what you want. 300% Confidence!!! I have 7+ years of experience in .NET, C# Programming. I have completed similar projects. Please contact me. Best regards, Steven
$140 USD in 7 days
4.4
4.4

I’m an experienced C# developer and can build a cross-platform .NET CLI utility that transforms WAV files into studio-quality cover versions with pitch shifting, tempo adjustment, and vocal isolation. The solution will use commercially safe audio libraries like NAudio and SoundTouch, include clean CLI flags, structured source code, build instructions, tests, and demo verification steps. I’ll deliver an efficient, production-ready tool that runs via dotnet run on the latest .NET release. I’m ready to start today.
$100 USD in 2 days
3.4
3.4

Hello, I can deliver a compact, cross-platform C# command-line tool that takes a WAV input and produces a studio-quality cover with warm, natural-sounding vocals. The solution centers on a modular pipeline: pitch shifting, tempo adjustment, and vocal isolation using well-known, MIT/Apache-licensed DSP techniques wired through .NET 8+. I’ll leverage robust, open-source libraries (e.g., NAudio for I/O and a proven pitch/tempo engine like SoundTouch or a compatible equivalent) and ensure clean licensing for commercial use. Deliverables include: a complete, readable C# source with a poked, well-structured CLI (‑‑input, ‑‑pitch, ‑‑tempo, ‑‑isolate-vocals, ‑‑output) with built-in help text; a compiled executable; a ReadMe with build steps, dependency setup, and usage examples; a quick demonstration clip validating pitch/tempo shifts and vocal removal with minimal artifacts; and lightweight unit tests or a verification script so you can reproduce results reliably. I’ll provide a compact verification routine that you can run locally to confirm artifact-free processing and reproducible results. The project will compile with the latest stable .NET release and run via dotnet run on Windows, macOS, and Linux. Best regards,
$70 USD in 3 days
0.0
0.0

⚠️IF YOU NOT HAPPY YOU DON'T PAY⚠️ Hi I've completed a similar job using C# and NAudio. Ultimately deliver a studio-quality cover version from a single WAV file. I understand you want pitch shifting, tempo adjustment and vocal isolation while keeping the voice warm and natural. Your focus is on a clean, efficient command-line utility compatible with the latest .NET version. I would love to chat more about your project! Regards, Kurt Siebritz
$100 USD in 14 days
0.0
0.0

Howdy! Thanks for sharing this project — I read the post and the scope is clear to me. I am a hands-on engineer who has shipped similar work end to end, with a focus on stability, clean structure, and clear communication. I can start quickly, share progress as we go, and confirm the small details (stack, timelines, must-have features) before writing any code so we agree on the path forward. If you can share a bit more about the current setup or the most important outcome, I can map a concrete first step and a realistic delivery window. Thank you, Marcos.
$156 USD in 7 days
0.0
0.0

With over 5 years of experience, I consider myself a master craftsman when it comes to C# programming. It's precisely this expertise that enables me to create robust and performant solutions. This is an especially critical aspect when dealing with audio processing like pitch shifting and tempo adjustment that requires meticulous handling of data for clean and artifact-free results. This ensures that your WAV files turn into polished covers with minimal fuss. Additionally, my familiarity with NAudio and SoundTouch among other audio libraries positions me well to tackle the DSP requirements of this project. I understand the nuances in leveraging open-source tools without compromising on licensing and commercial viability, so you can rest easy knowing every step I take is within legal boundaries. Lastly, thoroughness being an integral part of software development rests assured your CLI utility will have clear syntax, detailed read-me files, be able to run on the latest .NET releases on multiple platforms and also be furnished with basic unit testing or verification methods for reproducibility. I look forward to partnering with you to deliver not just a finished code but a full-fledged functional tool. Choose me for solid C# skills, adeptness with audio/DSP libraries and meticulous attention to detail uniform throughout the process.
$140 USD in 7 days
0.1
0.1

Hello, I can build this as a clean cross-platform C# CLI utility targeting the latest stable .NET version with support for pitch shifting, tempo adjustment, and vocal isolation while keeping the output natural and usable for studio-style cover generation. I would structure the tool with modular DSP processing so each stage can be tuned independently for better sound quality and reduced artefacts. For the implementation, I can use stable open-source audio libraries such as NAudio together with DSP tools like SoundTouch or similar commercially safe processing libraries. The utility can support clear CLI flags for input/output, pitch, tempo, and vocal isolation, along with verification samples, usage documentation, and simple reproducible tests so you can validate the processing pipeline easily on your side. Q1- Do you want the vocal isolation focused on extracting vocals only, or also generating karaoke/instrumental versions? Q2- Should the pitch and tempo processing preserve formants to avoid unnatural vocal distortion? Q3- Do you expect fully offline processing only, or should the architecture allow optional AI-based enhancement models later? Thank you.
$250 USD in 7 days
0.0
0.0

Warsaw, Poland
Payment method verified
Member since May 23, 2026
£20-250 GBP
₹12500-37500 INR
$10-30 USD
$55 USD
$250-750 AUD
$42 USD
min $50 AUD / hour
₹12500-37500 INR
₹37500-75000 INR
$30-250 USD
$250-750 USD
$48 USD
$3000-5000 AUD
$10-30 USD
$30-250 USD
$250-750 CAD
$30-250 AUD
$240-2000 HKD
$250-750 USD
$30-250 NZD