TajweedFormer
A model being built to hear tajweed: which sound was made, where, for how long, and with what colour.
In training. Not released. By Quran Lab.
What a teacher hears
TajweedFormer is being built to listen for the same four things, while the reciter is still reading.
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الحرف
Sound
Which letter, which vowel.
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المخرج
Place
Where in the mouth it was made.
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المد
Length
How many counts it was held.
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الصفات
Colour
Heavy or light, nasal, echoing.
Held in counts
A count is the time of one short vowel. Where more than one length is transmitted, every one is right.
Each trail grows at a reciter's pace, right to left with the script. Gold marks a permitted length; hollow marks a length permitted only under a condition: six for muttaṣil when stopping on its hamzah, two for munfaṣil by some turuq of Hafs. Tap a row to play it again.
Nūn and mīm at rest
The rule is decided by the letter that comes next. Choose one.
iẓhār
إظهار
Said plainly, before the six throat letters. No ghunnah.
صِرَٰطَ ٱلَّذِينَ أَنْعَمْتَ عَلَيْهِمْ
idghām with ghunnah
إدغام بغنة
Merged into the next letter, the ghunnah held. With ghunnah.
فَمَن يَعْمَلْ مِثْقَالَ
idghām without ghunnah
إدغام بلا غنة
Gone into the lām or rāʾ that follows. No ghunnah.
وَلَمْ يَكُن لَّهُۥ كُفُوًا
iqlāb
إقلاب
Turned into a mīm before bāʾ. With ghunnah.
مِنۢ بَعْدِ مِيثَٰقِهِۦ
ikhfāʾ
إخفاء
Hidden: neither plain nor merged, the sound through the nose. With ghunnah.
إِنَّآ أَنزَلْنَٰهُ
ikhfāʾ shafawī
إخفاء شفوي
The mīm hidden at the lips before bāʾ. With ghunnah.
تَرْمِيهِم بِحِجَارَةٍ
idghām shafawī
إدغام شفوي
Two mīms become one, doubled. With ghunnah.
ٱلَّذِىٓ أَطْعَمَهُم مِّن جُوعٍ
iẓhār shafawī
إظهار شفوي
Said plainly. Take care before wāw and fāʾ. No ghunnah.
لَمْ يَلِدْ وَلَمْ يُولَدْ
How it is meant to listen
Two readings can both be right.
It is being built to name the one it heard, not to correct it.
A stop changes the rule.
A pause for breath is not a mistake.
It describes. It does not grade.
And it does not replace a teacher.
How it is being built
A streaming Zipformer encoder, listening in 20 ms frames, with outputs for sound, timing and letter qualities. Designed to run on the phone, in real time.