Keherwa-to-Teental Bridge at 80 Matras per Minute
A 14-member school group in Patna is preparing a six-minute Bidesia-based item for the district youth festival. The recorded percussion track has two sections. Section A is Keherwa in madhya laya at 80 matras per minute; Section B is Teental at the same matra speed. Between them is a 30-second solo percussion bridge. The choreographer wants the dancers to enter on sam and leave on sam, and the stage manager can allow a total of 6 minutes 30 seconds, no more. In rehearsal the group rushes the bridge and misses the Teental sam by about two matras. The school requires a written cue sheet with matra counts, not just clock times, and the dancers must explain why the bridge cannot simply be counted in eights. The group has one week and a metronome but no live tabla player.
1. At 80 matras per minute, how many matras are in the 30-second bridge, and how many complete Keherwa and Teental cycles does that allow? Can the bridge end on a Teental sam without changing tempo or length? Show your arithmetic.
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At 80 matras per minute, the speed is 80 ÷ 60 = 1.33 matras per second. A 30-second bridge therefore contains 30 × 1.33 = 40 matras. Keherwa is 8 matras, so 40 ÷ 8 = 5 complete cycles. Teental is 16 matras, so 40 ÷ 16 = 2 complete cycles plus 8 matras. The extra 8 matras mean the bridge ends halfway through the third Teental cycle, not on sam. In Teental, sam falls on matra 1; after 32 matras you are on sam, after 40 you are on matra 9, which is khali. So a 30-second Teental bridge cannot end on sam without a tempo change or a length change. The nearest sam-to-sam lengths are 32 matras (24 seconds) and 48 matras (36 seconds).
2. Recommend a practical revision that keeps the total within 6:30, preserves sam-to-sam entries, and helps the dancers stop rushing. Give the new bridge length and the count logic.
Read the worked answer
Use a 36-second bridge = 48 matras = 3 complete Teental cycles. The total becomes 6 minutes 6 seconds, still within 6:30. Section A remains Keherwa, and the bridge is counted in 16s: sam on 1, 17 and 33, with the next sam at the start of Section B. This removes the half-cycle that caused the rushed entry. If the school insists on exactly 30 seconds, the bridge must be treated as five Keherwa cycles (40 matras) and the Teental section must begin on a fresh sam; that is valid only if the bridge is not itself in Teental. Do not count the bridge in eights while the next section is Teental, because 40 is not a multiple of 16.
3. Write the cue-sheet entries for the last Keherwa cycle, the bridge, and the first Teental cycle, showing how the dancers mark sam and avoid the two-matra early entry.
Read the worked answer
Last Keherwa cycle: 1 sam, 2-8 count, preparation for exit on 7-8. Bridge: three lines of 16: 1-16, 1-16, 1-16; mark sam with a silent clap and khali on 9 of each cycle. First Teental cycle: 1 sam (enter), 5 tali, 9 khali, 13 tali, 16 prepare. Rehearse with the metronome and only matra numbers, then add percussion. The two-matra early entry usually means the dancers are listening to the previous phrase rather than the new cycle; give them a visual cue on sam and a spoken count of 16-sam before entry. Record one run and check that the first footfall lands on 1, not on 15 or 16.