The Earthquake
Medinan · 8 verses · Revelation order 93 · Mushaf order 99
ٮسم الله الرحمں الرحىم
Bismi Allâhi alrraḥmâni alrraḥeemi
ادا رلرلٮ الارص رلرالها
Iẕâ zulzilati alarḍu zilzâlahâ
واحرحٮ الارص اٮٯالها
Waakhrajati alarḍu athqâlahâ
وٯال الاںسں ما لها
Waqâla alinsânu mâ lahâ
ىومىد ٮحدٮ احٮارها
Yawmaiẕin tuḥaddithu akhbârahâ
ٮاں رٮك اوحى لها
Bianna rabbaka awḥâ lahâ
ىومىد ىصدر الںاس اسٮاٮا لىروا اعملهم
Yawmaiẕin yaṣduru alnnâsu ashtâtan liyuraw aʿmâlahum
ڡمں ىعمل مٮٯال دره حىرا ىره
Faman yaʿmal mithqâla ẕarratin khayran yarahu
ومں ىعمل مٮٯال دره سرا ىره
Waman yaʿmal mithqâla ẕarratin sharran yarahu
Frequency
Sound generated from the letter values (abjad) of the text; independent of recitation.
Bar height = weight (count); position = frequency (logarithmic)
Options
Letter table
| Letter | Count | Hz | Band | Folded Hz |
|---|---|---|---|---|
| ا | 34 | 1 | Envelope | 1024 |
| ب | 3 | 2 | Envelope | 1024 |
| ج | 1 | 3 | Envelope | 768 |
| د | 2 | 4 | Envelope | 1024 |
| ه | 10 | 5 | Envelope | 640 |
| و | 7 | 6 | Envelope | 768 |
| ز | 4 | 7 | Envelope | 896 |
| ح | 2 | 8 | Envelope | 1024 |
| ي | 12 | 10 | Envelope | 640 |
| ك | 1 | 20 | Envelope | 640 |
| ل | 18 | 30 | Envelope | 960 |
| م | 11 | 40 | Envelope | 640 |
| ن | 6 | 50 | Envelope | 800 |
| س | 2 | 60 | Envelope | 960 |
| ع | 3 | 70 | Envelope | 1120 |
| ف | 1 | 80 | Envelope | 640 |
| ص | 1 | 90 | Envelope | 720 |
| ق | 4 | 100 | Carrier | 800 |
| ر | 13 | 200 | Carrier | 800 |
| ش | 2 | 300 | Carrier | 600 |
| ت | 5 | 400 | Carrier | 800 |
| ث | 4 | 500 | Carrier | 1000 |
| خ | 3 | 600 | Carrier | 600 |
| ذ | 5 | 700 | Carrier | 700 |
| ض | 2 | 800 | Carrier | 800 |
| Total abjad value of the verse | 16607 | |||
The total is shown as a number only; it is not part of the sound. The sound comes entirely from the letters.
Measurement charts
Charts fill while sound is playing.
Envelope spectrum — measured, 0.24 Hz resolution
Wave spectrum — measured (1–1200 Hz, logarithmic)
Variation spectrum — periodicities of the letter sequence
Position = period length (letters, logarithmic); height = power. Label: letters/period and its Hz at the chosen k.
How it works
Derived from letter values only, independent of recitation. Below 100 Hz: envelope modulation · 100 Hz and above: carrier tone; in a verse with no letter above 100 Hz the letters themselves carry, octave-folded. Sound is generated live in the browser; no file.
Sequential: in recitation order, each verse's own frequency profile (its carriers and envelope) plays one after another; verse duration is proportional to its letter count and the playing verse is marked in the list.
Flow: the letter sequence as one phase-continuous wave; each letter lasts k full periods of its own frequency (intrinsic duration = Σ 1/value). In the folded mode the per-letter tempo is fixed.
At surah level too the sound comes from letters only; in Sequential mode each verse plays with its own letters, in order.