Resources / Instruments / Setar fret adjustment

Setar fret adjustment

How moveable frets work

Established Setar frets are loops of gut, silk, or nylon tied around the neck in a simple wrap. They sit on the wood through friction — tight enough not to slide during playing, loose enough to be pushed along the neck with firm thumb pressure when a deliberate adjustment is needed.

This is fundamentally different from Western guitar frets (fixed metal strips set into slots) or even from the tied frets of a Turkish baglama (which are moveable in principle but repositioned less frequently). On a setar, adjusting frets between dastgahs is routine, not exceptional — it is part of the instrument's design, not a workaround.

What moves and what stays

Established Of the 25-28 frets on a typical setar, only a handful move for any given dastgah change. The frets fall into two categories:

Fixed-reference frets — these mark the consonant intervals that are stable across all dastgahs:

Mutable frets — these carry the koron and sori pitches that shift between dastgahs:

Practice This is the physical reality behind the mutable pitch concept — the frets that carry those pitches are the ones that move. Everything else stays put.

Step-by-step adjustment

Practice When changing dastgahs, follow this sequence:

1. Identify which pitches change. Not all dastgah transitions require fret adjustment. Going from Shur to Abu Ata (its avaz) may require no changes at all — the pitches are shared, only the emphasis shifts. Going from Shur to Chahargah changes several mutable pitches.

2. Loosen the fret. Press your thumb against the fret wrap from below the neck, pushing it slightly away from the wood. You don't need to untie it — just reduce friction enough to slide.

3. Slide to the new position. Use a reference: play the open string, then fret the note and compare against a known interval. The fourth string's open pitch is your most reliable check — if the fretted note should form a known consonance with it, listen for that.

4. Fine-tune by ear. Push the fret incrementally, pluck, listen, repeat. The target is not a theoretical cent value — it's the pitch that sounds right in the context of the dastgah you're about to play. Play a short phrase from that dastgah's opening (daramad) to confirm.

5. Check both octaves. If you adjust a fret in the lower octave, the corresponding fret in the upper octave should match (transposed). A single mutable pitch appears at two fret positions on the neck.

6. Tighten. Press the fret back into firm contact with the neck. It should not slide during normal playing pressure.

Common fret positions by dastgah

Practice These are approximate — the exact position depends on your instrument's scale length, string gauge, and your own aesthetic preference within the dastgah's tradition. They are starting points, not prescriptions.

Shur

The foundational dastgah. Its characteristic pitch is the low neutral second:

• Re koron: ~140-150 cents — distinctly lower than a quarter-tone. This is the pitch that gives Shur its melancholic character.
• Si koron: ~1040-1050 cents — the upper-register mirror.
• Other frets at standard positions.

Segah

Starts on the third degree, which is itself a neutral pitch:

• Mi koron: ~355-360 cents — the starting pitch of the dastgah. Placed higher than many expect.
• Re koron: ~155-160 cents — slightly higher than Shur's Re koron. This difference is subtle but musically significant.
• Si koron: ~1055-1060 cents — follows Mi koron proportionally.

Chahargah

Bright and tense, with augmented seconds:

• Mi koron: ~340-350 cents — lower than Segah's placement.
• Fa diez: ~600 cents — the tritone position becomes active; may need adjustment if your instrument's fret is set for Mahur instead.
• Si koron: ~1040-1050 cents — in the lower part of its range.

Mahur

Major-sounding, closest to a Western major scale:

• All mutable frets at their higher positions: the koron pitches are raised toward their natural (non-koron) neighbours.
• Mi: ~385-400 cents — a clear major third.
• Si: ~1085-1100 cents — a clear major seventh.
• Few or no fret adjustments needed if your instrument is already set for a bright, major-sounding context.

Homayoun

Dark, with an augmented second between the second and third degrees:

• Re koron: ~140-150 cents — similar to Shur.
• Mi: ~385-400 cents — a major third (the jump from Re koron to Mi creates the characteristic augmented second).
• Si koron: ~1040-1050 cents — standard placement.

Practical tips

Practice

• Don't adjust during performance. All fret changes happen before playing begins. If a piece modulates to a dastgah with different fret positions, the performer handles it with finger pressure adjustments (bending the string against the fret), not by stopping to move frets.

• Mark your fret positions. Some players make tiny pencil marks on the side of the neck for their most-used dastgah settings. This is practical, not improper — it speeds up the adjustment process.

• New frets stretch. Freshly tied gut frets will slip for the first few playing sessions. Retie them once they've stopped stretching. Nylon frets are more stable but some players prefer gut for its grip.

• The ear is the final authority. No ruler measurement, no tuner reading, and no cent value replaces the judgment of whether the fret sounds right in context. Adjust, play a phrase, listen, correct.

Sources

• Dariush Talai, A New Approach to the Theory of Persian Art Music (Mahoor Institute of Culture and Art, Tehran, 1993) — measured fret positions and intervallic analysis per dastgah
• Hormoz Farhat, The Dastgah Concept in Persian Music (Cambridge University Press, 1990) — descriptions of characteristic intervals within each dastgah
• Jean During, The Art of Persian Music (Mage Publishers, Washington, D.C., 1991) — practical guidance on setar maintenance and fret adjustment techniques
• Bruno Nettl, The Radif of Persian Music: Studies of Structure and Cultural Context (Elephant & Cat, 1987; rev. ed. 1992) — on the relationship between radif structure and instrument tuning