Playing & Technique — plain-language explainers

The one fixed reference underneath every tuning-related skill in this section

ISO 16:1975 sets concert A at 440 Hz, held “within an accuracy of 0.5 Hz” — the number “how-to-tune-a-guitar” ultimately checks every string against, and the reference that makes reading tab or sheet music mean the same pitch on any correctly-tuned instrument. Notation and tuning are two separate skills below, but they only agree with each other because both are anchored to the same fixed number.

What actually makes practice effective, per an actual study of how musicians improve

The University of Texas’s Center for Music Learning offers guidance worth applying to every technical skill on this page, not just the “how-to-practise-effectively” article it is cited on: “divide your practice time into small segments” — three 20-minute blocks or two 30-minute blocks rather than one continuous hour — and stop each segment “before you really want to stop,” which supports retention between sessions. On rotating between goals, the same source recommends working “for 5 minutes or so, then… to the next goal for another 5 or so,” rather than one long block per goal, noting this “has been shown to be very effective in refining skills” even though accuracy within any single short block may look worse than a longer one would.

Two levers, not one: a guitarist could spend an entire practice hour chasing perfect intonation against ISO 16’s 440 Hz reference and still improve slower than splitting that same hour into three 20-minute blocks, per the UT Austin guidance. Tuning accuracy and session structure are separate questions, and this section has an article grounded in each.

Split a practice session the way the research suggests

Enter your usual practice length, and this splits it per the UT Austin guidance above — three shorter blocks rather than one long one.

Where this comes from

ISO 16:1975, Acoustics — Standard tuning frequency: concert A at 440 Hz, held within 0.5 Hz. iso.org · accessed 4 August 2026.

University of Texas at Austin, Center for Music Learning — Bob Duke & Amy Simmons, “Tips for Effective Practice”: the session-splitting and goal-rotation guidance quoted above. cml.music.utexas.edu · accessed 4 August 2026.

The calculator’s block sizes are this batch’s own arithmetic applied to the source’s worked examples (three 20-minute or two 30-minute blocks for an hour), generalised to other lengths — not themselves a figure the source states for every possible duration.