Fix The Mix: free tools to mix better

Start by knowing what's wrong with your mix

The mix analyser reads your bounce and tells you where the problem is: loudness in LUFS, true peaks, dynamic range, how the energy spreads across seven bands and whether the stereo survives a fold to mono. It opens with five release checks that don't depend on the genre, ends with three concrete actions and a check of how it will sound on a phone speaker, which is where most people will hear it, and lets you hear the Fix Pass: your master with those corrections applied, in A/B. It runs in your browser, with no account, and the audio never leaves your computer.

Next to it are the other three day-to-day tools, also open: a chromatic tuner, a BPM and key finder and a piano online with chords and scales. Nothing to install and nothing to sign up for.

Learning to mix starts with learning to hear

You can memorise what every control on a compressor does and still not know when to use it. You can read about EQ for months and still not locate the frequency dirtying a guitar. All the technical knowledge in mixing rests on a prior skill that isn't acquired by reading: telling what's actually happening in the sound.

Fix The Mix trains that skill with short exercises and immediate feedback, which is the condition for the ear to learn anything. Each exercise poses a real mixing problem — a boosted band, a badly set compressor, an element misplaced in the stereo field — asks you for an answer and tells you straight away whether you got it right. That loop is what turns listening into recognising.

What's inside

The ear training section organises the skills into a phased routine, and each one has its exercise: the EQ Surgeon for identifying frequencies, the Gain Rider for dynamics in motion, and Stereo Space for position and width. If you'd rather start by knowing where you're weak, the mix skills test points at it in eight questions, no sign-up.

Alongside the exercises there are working tools that run in the browser with nothing to install: a chromatic tuner, an online piano, a BPM and key finder and a mix analyser that compares your frequency balance against genre references.

The theory, written to be applied

Training your ear without knowing what to listen for is slow, so every exercise has an article behind it explaining what to listen for. 18 guides, no preset recipes: what each decision does to the sound and how to know whether you got it right. The most recent, "Tuning: why the tuner says it's fine and the mix still sounds out of tune", was published on 8 September 2026.

See the full guides section

Who is behind this

Fix The Mix is made by Artek Futura, a Valencia-based company founded by Mónica Andrade, an artist, producer and audio engineer who graduated from Berklee College of Music and is known as Monár for the music she releases. She writes and signs the guides herself: they aren't summaries of other people's articles — they come out of actually mixing and producing, which is why they take a side when there's a side to take instead of listing every possible option.

If you spot a mistake in a guide or want to suggest a topic, write to hello@artekfutura.com. Every email gets read, and the guides get corrected.

Frequently asked questions