How does a metronome’s clock differ from its screen timer?
Reading Narae’s Android and iOS audio source separates sample-based beat generation from screen updates, and beat regularity from output latency.
Read note →Notes from the workbench.
Questions that came up while building audio apps and web tools, plus notes on maps, public data, and currency exchange.
23 notes
How a tuner finds a note: inspect Narae’s detector from its input
We inspected Narae’s pitch detector and ran sine, silence, and noise inputs. Separating frequency estimation from cents conversion also helps diagnose a missing reading.
Read note →Loop boundaries and sleep-timer endings are different transitions
Read Daraly’s current local audio source by separating looping, volume changes, and timer shutdown, including how it differs from the old web crossfade example.
Read note →Serve a small public directory with static JSON and browser search
Trace a local dataset-loading flow, run an independent search example, and account for downloads, updates, and failures.
Read note →Before putting public data on a map, inspect the missing rows
Producing a file is not the same as validating its contents. Reading BAKUO’s local data builder reveals where rows are excluded and what coordinate checks actually establish.
Read note →Where can location data go during nearby search?
A local distance calculation and a service-wide privacy claim cover different things. Review location requests, denied permission, and external map links separately.
Read note →When does this site create its HTML?
Follow RAONIZ’s actual build files through page generation, bilingual routes, asset bundling, and the checks that run before publication.
Read note →What to check when an old page remains after deployment
Read RAONIZ’s firebase.json separately for HTML, hashed assets, and images, then follow a short procedure to inspect the public response.
Read note →Calculate a distance from coordinates and check the result
Run a Haversine calculation, test valid and invalid inputs, and distinguish a straight-line estimate from a walking route.
Read note →Check an address before turning it into a map pin
Address cleaning, geocoding, and coordinate transformation are different jobs. Keep the source and verify the result before publishing a pin.
Read note →Check data and tile policies when adding a Leaflet map
Map software, data licensing, and tile delivery have separate requirements. Check attribution and network requests in the browser.
Read note →Decide whether nearby search needs a spatial index
Use a bounding-box example to define correctness, then compare a scan, a grid, and a Quadtree against the actual workload.
Read note →Build and check an external map link for a place
Pass a place name and coordinates to Kakao or Google Maps, then check encoding, transport mode, and behavior without the app.
Read note →Read a cash exchange quote and calculate a rate discount
Identify the transaction direction and quotation unit, then calculate the won cost before and after a discount using an illustrative example.
Read note →Check a money changer’s name and address in Customs records
Compare the register’s reference date and identifying fields, then check opening, stock, and prices separately with the shop.
Read note →Compare a bank and money changer for the same cash amount
Normalize two quotes to the same currency and amount, then calculate how separate charges and travel costs affect the choice.
Read note →Compare exchanging leftover cash, changing currency, and keeping it
Separate the original purchase price from today’s proceeds, then record the costs of selling, converting, or keeping leftover notes.
Read note →Check collection points and costs before exchanging at an airport
Distinguish preordered cash collection from a walk-up exchange, then check terminal access, hours, and the cash needed after arrival.
Read note →Read quotation units and note denominations for USD, JPY, and EUR
Account for quotes per dollar, per 100 yen, or per euro, then check the note denominations you will collect.
Read note →Keep TWD, HKD, and CNY distinct on a multi-stop trip
Separate similar symbols and names, then record budgets and leftover notes by currency when visiting several destinations.
Read note →Calculate a two-step exchange quote for Thailand, Vietnam, or the Philippines
Compare direct exchange and a route through dollars using one starting budget, then account for charges on the second transaction.
Read note →Check denominations, condition, and security features when collecting notes
Match note quantities to the receipt and consult the correct official design guide, while separating a counter’s acceptance policy from authenticity checks.
Read note →Prepare travel cards and cash by payment task
Identify cash-only spending, check card and ATM costs, and prepare for the currency choice shown at payment.
Read note →No notes match this search.