The Night
Meccan · 21 verses · Revelation order 9 · Mushaf order 92
بِسْمِ ٱللَّهِ ٱلرَّحْمَٰنِ ٱلرَّحِيمِ
Bismi Allâhi alrraḥmâni alrraḥeemi
وَٱلَّيْلِ إِذَا يَغْشَىٰ
Waallayli iẕâ yaghshâ
وَٱلنَّهَارِ إِذَا تَجَلَّىٰ
Waalnnahâri iẕâ tajallâ
وَمَا خَلَقَ ٱلذَّكَرَ وَٱلْأُنثَىٰٓ
Wamâ khalaqa alẕẕakara waalonthâ
إِنَّ سَعْيَكُمْ لَشَتَّىٰ
Inna saʿyakum lashattâ
فَأَمَّا مَنْ أَعْطَىٰ وَٱتَّقَىٰ
Faammâ man aʿṭâ waittaqâ
وَصَدَّقَ بِٱلْحُسْنَىٰ
Waṣaddaqa bialḥusnâ
فَسَنُيَسِّرُهُۥ لِلْيُسْرَىٰ
Fasanuyassiruhu lilyusrâ
وَأَمَّا مَنۢ بَخِلَ وَٱسْتَغْنَىٰ
Waammâ man bakhila waistaghnâ
وَكَذَّبَ بِٱلْحُسْنَىٰ
Wakaẕẕaba bialḥusnâ
فَسَنُيَسِّرُهُۥ لِلْعُسْرَىٰ
Fasanuyassiruhu lilʿusrâ
وَمَا يُغْنِى عَنْهُ مَالُهُۥٓ إِذَا تَرَدَّىٰٓ
Wamâ yughnee ʿanhu mâluhu iẕâ taraddâ
إِنَّ عَلَيْنَا لَلْهُدَىٰ
Inna ʿalaynâ lalhudâ
وَإِنَّ لَنَا لَلْـَٔاخِرَةَ وَٱلْأُولَىٰ
Wainna lanâ lalâkhirata waaloolâ
فَأَنذَرْتُكُمْ نَارًا تَلَظَّىٰ
Faanẕartukum nâran talaẓẓâ
لَا يَصْلَىٰهَآ إِلَّا ٱلْأَشْقَى
Lâ yaṣlâhâ illâ alashqâ
ٱلَّذِى كَذَّبَ وَتَوَلَّىٰ
Allaẕee kaẕẕaba watawallâ
وَسَيُجَنَّبُهَا ٱلْأَتْقَى
Wasayujannabuhâ alatqâ
ٱلَّذِى يُؤْتِى مَالَهُۥ يَتَزَكَّىٰ
Allaẕee yutee mâlahu yatazakkâ
وَمَا لِأَحَدٍ عِندَهُۥ مِن نِّعْمَةٍ تُجْزَىٰٓ
Wamâ liaḥadin ʿindahu min niʿmatin tujzâ
إِلَّا ٱبْتِغَآءَ وَجْهِ رَبِّهِ ٱلْأَعْلَىٰ
Illâ ibtighâa wajhi rabbihi alaʿlâ
وَلَسَوْفَ يَرْضَىٰ
Walasawfa yarḍâ
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 | 56 | 1 | Envelope | 1024 |
| ب | 8 | 2 | Envelope | 1024 |
| ج | 4 | 3 | Envelope | 768 |
| د | 5 | 4 | Envelope | 1024 |
| ه | 14 | 5 | Envelope | 640 |
| و | 21 | 6 | Envelope | 768 |
| ز | 2 | 7 | Envelope | 896 |
| ح | 3 | 8 | Envelope | 1024 |
| ط | 1 | 9 | Envelope | 1152 |
| ي | 40 | 10 | Envelope | 640 |
| ك | 6 | 20 | Envelope | 640 |
| ل | 39 | 30 | Envelope | 960 |
| م | 13 | 40 | Envelope | 640 |
| ن | 22 | 50 | Envelope | 800 |
| س | 12 | 60 | Envelope | 960 |
| ع | 8 | 70 | Envelope | 1120 |
| ف | 5 | 80 | Envelope | 640 |
| ص | 2 | 90 | Envelope | 720 |
| ق | 5 | 100 | Carrier | 800 |
| ر | 12 | 200 | Carrier | 800 |
| ش | 3 | 300 | Carrier | 600 |
| ت | 13 | 400 | Carrier | 800 |
| ث | 1 | 500 | Carrier | 1000 |
| خ | 3 | 600 | Carrier | 600 |
| ذ | 9 | 700 | Carrier | 700 |
| ض | 1 | 800 | Carrier | 800 |
| ظ | 1 | 900 | Carrier | 900 |
| غ | 4 | 1000 | Carrier | 1000 |
| Total abjad value of the verse | 28817 | |||
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.