
Fermé
Publié
I need a small, self-contained Python backend that ingests local MP3 files and automatically extracts musical information. For every track the service must detect • BPM and time signature • Overall tempo as well as integrated loudness (LUFS or a comparable metric) • Phrase boundaries and sections of complete silence Once a file is processed the results have to be written to a single CSV file—one row per track, neatly formatted with column headers for each metric. No database or JSON output is required. A minimal REST or command-line interface that lets me submit a path to an MP3 and returns the processing status is enough; the core value is the signal-processing code itself. Please rely on well-known Python libraries such as librosa, Essentia, pydub or similar so the solution remains transparent and easy to maintain. All third-party dependencies should be listed in a requirements.txt. Deliverables 1. Clean, well-commented source code (Python 3.x) 2. [login to view URL] with exact versions 3. Example CSV produced from at least two sample MP3s 4. Short README explaining how to install, run, and extend the service I will consider the project complete when I can install the environment with a single pip command, feed an MP3 into the script or endpoint, and see a correctly populated CSV that matches the reported BPM, tempo, loudness, phrase start/end times, and silent regions.
N° de projet : 40234714
144 propositions
Projet à distance
Actif à il y a 16 jours
Fixez votre budget et vos délais
Soyez payé pour votre travail
Surlignez votre proposition
Il est gratuit de s'inscrire et de faire des offres sur des travaux
144 freelances proposent en moyenne €26 EUR/heure pour ce travail

As a seasoned Python developer with specialized expertise in audio analysis, I can effectively fulfill the requirements of your Python Audio Analysis Backend project. My experience with signal processing and libraries like Librosa and Pydub will allow me to extract detailed musical information such as BPM, time signatures, and silence detection efficiently. I have a track record of delivering well-documented, maintainable codebases, which aligns seamlessly with your deliverable requirements. My focus is on implementing robust and transparent solutions using well-known libraries to ensure maintainability and ease of integration. I have extensive experience working on similar audio and signal processing projects, ensuring accurate and reliable measurement metrics. The use of a minimal REST or command-line interface is something I have implemented in past projects, ensuring smooth user experience to meet core functional goals without complexity. I am interested in discussing how this can best serve your project needs further. Could you provide any specific preferences on the interface choice? Looking forward to the opportunity to contribute to your project.
€25 EUR en 40 jours
8,4
8,4

⭐⭐⭐⭐⭐ Create a Python Backend to Extract Musical Data from MP3 Files ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you're looking for a Python backend to process MP3 files. You don't need to look any further; Zohaib is here to help you! My team has completed over 50 similar projects in audio processing. I will create a solution that efficiently extracts BPM, tempo, loudness, and other metrics, writing the results neatly into a CSV file. ➡️ Why Me? I can easily build your Python backend as I have 5 years of experience in audio analysis, including working with libraries like librosa and pydub. My skills include data processing, CSV generation, and creating REST interfaces. Additionally, I have a strong grip on Python coding standards and best practices, ensuring a clean and maintainable codebase. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. I look forward to discussing this with you in our chat. ➡️ Skills & Experience: ✅ Python Programming ✅ Audio Processing ✅ CSV File Handling ✅ REST API Development ✅ Data Analysis ✅ Libraries (librosa, pydub) ✅ Signal Processing ✅ Code Optimization ✅ Documentation Writing ✅ Error Handling ✅ Version Control ✅ Software Maintenance Waiting for your response! Best Regards, Zohaib
€22 EUR en 40 jours
8,0
8,0

With over 10 years of experience in web and mobile development, specializing in Python, I understand the need for a self-contained Python backend for audio analysis. Your project requires detecting BPM, time signature, tempo, loudness, phrase boundaries, and silent regions from MP3 files, with results neatly formatted in a CSV file. I have a strong background in signal processing and Python libraries like librosa, ensuring a transparent and maintainable solution. In the realm of audio analysis, I have successfully delivered similar projects that meet or exceed expectations. My expertise will ensure a clean, well-commented source code, accurate processing of audio files, and thorough documentation. I am committed to delivering the specified deliverables within the budget and timeline outlined. If you are ready to kick start this project, please feel free to reach out to discuss further details and get started on creating this innovative Python backend for audio analysis.
€28,80 EUR en 15 jours
7,5
7,5

Hi there, I have checked your requirement carefully and gone through. I think that I can help you to complete this project 100% perfectly sure to satisfy your requirement. I appreciate if you give me an opportunity contact once to discuss this further. I would love to build an awesome working relationship with you using my expertise. Thank You!
€30 EUR en 40 jours
7,7
7,7

The Python Audio Analysis Backend project aligns perfectly with my skills in Python, Data Processing, Software Architecture, RESTful API, and Audio Processing. I am confident in delivering a high-quality solution that meets your requirements. The budget can be adjusted based on project scope, and I am committed to working within your constraints. Please review my 15-year-old profile to see my extensive experience. Let's discuss the details and get started on this project. I am eager to showcase my dedication by beginning work even before being officially hired. Looking forward to your response.
€25 EUR en 3 jours
7,3
7,3

Let me develop this Python backend/script which lets you ingests a supplied MP3 and automatically extracts musical information such as BPM, time signature, overall tempo, integrated loudness, phrase boundaries and sections of complete silence, into a CSV. As you've recommended, my approach will be to use librosa, Essentia, pydub or similar libraries. As for the REST backend, Flask is a lightweight option that we should consider. Let me know when you want me to start
€26 EUR en 40 jours
7,3
7,3

Hello, sure yours is clearly a very well defined Python project, I would guess that you might have tried already with an AI-coder to develop it or at least a part of it? I should ask this because nowadays almost everyone sends me an "initial application" to start with when a new project kicks off. Your specifications are pretty clear and structured so I would guess I could move pretty fast with a working version of the tool (more than a prototype). Any point you have listed is a standard requirement for me when it comes to Python. I have been working with Python since 2017, I have developed any kind of automation and web API to support such automations, so feel free to chat with me about the specifics if you're interested. I expect your MP3 automation to have a smooth and clean progress Regards, Thanassis
€24 EUR en 15 jours
7,1
7,1

Dear , We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in Python, Data Processing, Software Architecture, RESTful API, Audio Processing, Signal Processing and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
€25 EUR en 5 jours
7,8
7,8

Hi I’m your web developer, ready to turn your project Python Audio Analysis Backend into reality! I’d love to discuss the details and create something amazing together. Feel free to message me anytime, and we can also hop on a quick video or audio call whenever it's convenient for you. I’ve developed many projects exactly like what you’re looking for. If you want to see more relevant samples, just contact me through the chatbox, and I’ll share them instantly. ★ Why Clients Trust Me 500+ successful web projects delivered 430+ positive client reviews Expert in Python, Data Processing, Software Architecture, RESTful API, Audio Processing, Signal Processing WordPress, Shopify, PHP, JavaScript, HTML, CSS, Plugin/Theme Development, Laravel, WebApp Clean, modern, responsive and SEO-optimized designs Fast delivery, great communication, and long-term support Available during EST hours for smooth collaboration If you want a professional developer who delivers quality work on time and stress-free, let’s connect. I’m excited to help build something amazing for you. Best regards, Kausar Parveen
€27 EUR en 40 jours
6,3
6,3

Drawing from my diverse skill set as an Electrical Engineer with a specialization in embedded systems and firmware development, and with a core expertise in signal processing, I am ideally positioned to tackle your Python Audio Analysis Backend project. My extensive familiarity with notable Python libraries such as librosa and pydub in conjunction with my grasp on efficient and robust Python development practices ensures that I can deliver the small yet comprehensive, self-contained backend you require. I can guarantee clean, well-commented source code in Python 3.x that relies solely on the dependencies listed in the requirements.txt. My focus on detail and efficiency will be instrumental in ensuring accurate musical information extraction including BPM, time signature, tempo, loudness, phrase boundaries and silent sections. The resulting data will be organized and written into a single CSV file exactly matching your stipulations - one row per track - enabling easy access and readability. I will furthermore provide a short README document detailing how to install, run and extend the service in a user-friendly manner.
€36 EUR en 40 jours
6,2
6,2

Hello Dear! I write to introduce myself. I'm Engineer Toriqul Islam. I was born and grew up in Bangladesh. I speak and write in English like native people. I am a B.S.C. Engineer of Computer Science & Engineering. I completed my graduation from Rajshahi University of Engineering & Technology ( RUET). I love to work on Web Design & Development project. Web Design & development: I am a full-stack web developer with more than 10 years of experience. My design Approach is Always Modern and simple, which attracts people towards it. I have built websites for a wide variety of industries. I have worked with a lot of companies and built astonishing websites. All Clients have good reviews about me. Client Satisfaction is my first Priority. Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap4 4. jQuery 5. JavaScript 6. Angular JS 7. React JS 8. Node JS 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .Net 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB What you'll get? • Fully Responsive Website on All Devices • Reusable Components • Quick response • Clean, tested and documented code • Completely met deadlines and requirements • Clear communication You are cordially welcome to discuss your project. Thank You! Best Regards, Toriqul Islam
€30 EUR en 40 jours
5,4
5,4

Hi there,Good afternoon I am Talha. I have read you project details i saw you need help with Data Processing, Python, Signal Processing, Software Architecture, Audio Processing and RESTful API I am pleased to present my proposal, highlighting our extensive experience and proven track record in delivering exceptional results. Our portfolio of success will showcase past projects that demonstrate our ability to meet and exceed client expectations. Glowing testimonials from satisfied clients will attest to our professionalism, dedication, and the quality of our work Please note that the initial bid is an estimate, and the final quote will be provided after a thorough discussion of the project requirements or upon reviewing any detailed documentation you can share. Could you please share any available detailed documentation? I'm also open to further discussions to explore specific aspects of the project. Thanks Regards. Talha Ramzan
€21 EUR en 31 jours
5,4
5,4

You are not looking for a coder. You are looking for someone who can build this properly. That is exactly why your project stood out. Your objective to develop a Python backend that precisely extracts BPM, tempo, loudness, phrase boundaries, and silent sections from MP3s using established libraries reflects a commitment to transparent, maintainable signal-processing architecture that supports clear, actionable musical insights. At DigitaSyndicate, a UK-based digital systems agency, we build precision-engineered automation and data pipelines designed for reliable, scalable performance. Our approach emphasizes clean, well-documented code aligned with your requirements for a minimal interface and CSV outputs, ensuring your musical metadata service remains intuitive and future-proof. We recently delivered a signal-processing platform leveraging librosa and pydub to produce robust audio feature extraction with audit-ready reporting. Can you share your main priorities and timeline so I can map out the right execution plan for you? Casper M. Project Lead | DigitaSyndicate Precision-Built Digital Systems.
€27 EUR en 14 jours
5,3
5,3

As an accomplished Full-Stack Developer, my skills and expertise across a range of technologies align perfectly with the requirements of your project. My wealth of experience in Python, including libraries such as librosa, Essentia, and pydub will enable me to deliver a well-commented and robust Python backend solution swiftly. Having built numerous clean, efficient, and scalable web and mobile applications, I understand your need for the signal-processing code itself to be the core value of this project.
€27 EUR en 40 jours
4,9
4,9

As a highly experienced Web Developer proficient in Python and skilled in the creation and deployment of RESTful APIs, I am confident in my ability to provide you not only with an accurate, efficient and highly functional Python audio analysis backend but also a satisfactory user experience. My decade-long career has informed my expertise in crafting clean, well-commented source codes that are easy to understand, update and maintain. I am no stranger to working with various libraries, such as librosa and Essentia, which will be invaluable within this project. From your requirement of a single CSV file neatly formatted with column headers for each metric, I understand that maintaining data integrity is of great importance. My proficiency in working with databases like MySQL and MongoDB will facilitate this task. Additionally, having worked as a full-stack developer for over 10 years, I am well versed in both front-end (React, Vue etc) and back-end (Python, Flask etc) frameworks. Combined with my strong skills in handling CentOS systems akin to what we might expect during AWS deployment or Linux SysAdmin tasks ensures that the script or endpoint I create for your MP3 processing will meet all your expectations from install to execution and beyond. I'm excited about this project and look forward to revolutionizing your audio analysis!
€35 EUR en 40 jours
5,0
5,0

Hi there, I’m Ahmed from Eastvale, California — a Senior Full-Stack Engineer with over 15 years of experience building high-quality web and mobile applications. After reviewing your job posting, I’m confident that my background and skill set make me an excellent fit for your project. I’ve successfully completed similar projects in the past, so you can expect reliable communication, clean and scalable code, and results delivered on time. I’m ready to get started right away and would love the opportunity to bring your vision to life. Looking forward to working with you. Best regards, Ahmed Hassan
€30 EUR en 40 jours
4,8
4,8

Hi! Javier from Spain here. I can build this backend for you using Librosa and Pydub without any problem. One quick note on the "correct results" part: audio detection isn't an exact science. Things like BPM or phrases can be tricky depending on the genre—a Jazz track or a song with variable tempo won't always give a "perfect" match. I’d suggest we base the project completion on getting the best possible output these libraries can offer. Hourly Rate is just a placeholder. Do not take into account. Javier
€100 EUR en 40 jours
4,5
4,5

Hi, With my extensive 15+ years of experience and an impeccable track record with companies like Avaya and Pramati, I bring a versatile skill set and deep expertise in data processing and software architecture to your Python Audio Analysis Backend project. As a seasoned developer, I take a comprehensive approach to problem-solving and system design, ensuring that the solution is not just efficient but also future-proof, robust, and secure - something essential for your project. Given your requirement for a small yet self-contained Python backend that can analyze MP3 files and accurately extract musical information, it’s clear that my proficiency in this domain will be of significant advantage to you. Furthermore, my advanced knowledge of relevant Python libraries such as librosa, Essentia, pydub further consolidates my suitability for the job. Over the years I've built a reputation for transparent and maintainable solutions, exactly what you need for your audio analysis project.
€27 EUR en 40 jours
4,0
4,0

Hallo, ich bin Python-Entwickler mit praktischer Erfahrung in Audio- und Signalverarbeitung unter Einsatz von librosa, Essentia, pydub und NumPy. Zudem habe ich bereits kleinere REST- und CLI-Services für die Batch-Analyse von Mediendateien umgesetzt. In früheren Projekten habe ich BPM-Erkennung, Onset- und Beat-Tracking, Lautheitsmessung (LUFS-nahe Berechnungen) sowie Silence-Segmentierung implementiert und die Ergebnisse strukturiert als CSV für die Weiterverarbeitung exportiert. Dieses Projekt spricht mich besonders an, da es klar abgegrenzt, technisch anspruchsvoll und auf sauberen, wartbaren Signal-Processing-Code fokussiert ist – ohne unnötige Infrastruktur. Ich würde die Lösung als schlanken, CLI-first-Service (optional mit FastAPI) strukturieren, mit klar definierten Verarbeitungsschritten: Load → Tempo/Taktart analysieren → integrierte Lautheit berechnen → Phrasengrenzen erkennen (z. B. via Onset-Clustering) → Stille erkennen (Energy-Thresholding) → Ergebnisse in CSV schreiben. Kurze Rückfragen: Wird eine vollständig EBU R128-konforme LUFS-Berechnung benötigt (z. B. über pyloudnorm oder ffmpeg), oder ist eine präzise Annäherung ausreichend? Und bei der Erkennung von Phrasengrenzen: Bevorzugen Sie musikalisch inferierte Abschnitte (z. B. Novelty Detection) oder eine strukturelle Segmentierung auf Basis von Energie- und Onset-Mustern? Ich freue mich auf Ihre Rückmeldung. Beste Grüße Mickey
€30 EUR en 40 jours
4,2
4,2

Turning raw audio files into reliable musical data is a real headache when tools are clunky or the output is messy. Manually tracking BPM, silence, and loudness for every MP3 eats up valuable time and leaves too much room for error, especially when you just want a clean CSV and not a complicated database. You can expect a Python backend that digests your local MP3s and delivers a tidy, single CSV with BPM, time signature, tempo, loudness, and clear phrase and silence markers for each track. First, I’ll build the heart of the service using trusted Python libraries so the signal processing is accurate and transparent. Next, I’ll set up a simple command-line or REST interface that lets you submit any MP3 path on your machine. Finally, processed results will land neatly in a CSV, ready for use, with all dependencies clearly listed. Does your workflow include any unusual MP3 formats or tagging quirks I should watch out for?
€28 EUR en 40 jours
4,0
4,0

Osnabrück, Germany
Membre depuis févr. 16, 2026
£10-15 GBP / heure
₹600-1500 INR
₹12500-37500 INR
$10-30 USD
$25-50 USD / heure
₹100-400 INR / heure
₹12500-37500 INR
$10-30 USD
$30-250 USD
$5000-10000 USD
₹12500-37500 INR
₹12500-37500 INR
₹1500-12500 INR
$250-750 USD
£10-20 GBP
₹100-400 INR / heure
$30-250 USD
$10-30 USD
$250-750 USD
$250-750 USD