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Dergiler / Konservatoryum / 2026 / Cilt: 13 Sayı: 1

Pianoda Sustain Pedal Etkisinin Ses Özniteliklerine Dayalı Karşılaştırmalı Analizi

A Comparative Analysis of the Piano Sustain Pedal’s Effect Based on Audio Features

İsmet Emre Yücel

Sayfa
58–72
Yayın Tarihi
2026-06-30
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Özet

Bu çalışma MIDI verilerinden elde edilen piyano kayıtlarında sustain pedal kullanımının neden olduğu etkileri ses öznitelikleri üzerinden nicel olarak incelemektedir. Veri üretiminde Frédéric Chopin’in Polonez eserlerine ait 10 adet MIDI kaydı aynı performans verisi korunarak bir piyano VST’si (Virtual Studio Technology) ile pedallı ve pedalsız olacak şekilde iki koşulda yeniden üretilmiştir. Her eser için pedal zamanlamaları göz önünde bulundurularak ilgili MIDI dosyalarından her biri en az 1 sn uzunluğunda olacak şekilde eşleştirilmiş (pedallı ve pedalsız) segment çiftleri oluşturulmuştur. Her segment için zaman düzlemi (RMS, tepe zarfı, ZCR, ACF/MaxACF, tonal güç oranı), izgesel (akı, merkez, yayılım, eğim, rolloff, crest factor, çarpıklık, basıklık) ve kepstral (MFCC 1–13) öznitelikler ayrı ayrı hesaplanmıştır. Pedallı–pedalsız karşılaştırmaların eşleştirilmiş örneklem t-testi (paired-sample t-test) ile değerlendirilmiştir, büyük örneklem etkisine karşı bulguların yorumunda Cohen’s 𝑑z etki büyüklüğü esas alınmıştır. Çalışmanın kısıtlılıkları göz önünde bulundurulduğunda sonuçlar pedal etkisinin özellikle izgesel eğim, maksimum otokorelasyon ve düşük mertebeli MFCC katsayılarında orta düzey ve üzeri etki büyüklükleri ürettiğini göstermektedir. Bulgular, pedal tespiti ve açıklanabilir öznitelik temelli modeller için aday girdiler önermektedir.

Abstract

This study quantitatively examines how the use of a sustain pedal alters the audio features of piano recordings based on MIDI data. In data production, 10 MIDI recordings of Frédéric Chopin's Polonaise works were reproduced in two conditions—with and without pedals—using a piano VST, while preserving the same performance data. For each piece, pedal timings were taken into account, and pairs of segments (with and without pedals) were created from the corresponding MIDI files, each at least 1 second in length. For each segment, time-domain (RMS, peak envelope, ZCR, ACF/MaxACF, tonal power ratio), spectral (flux, centroid, spread, slope, rolloff, crest factor, skewness, kurtosis), and cepstral (MFCC 1–13) features were calculated separately. Pedaled–unpedaled comparisons were evaluated using a paired sample t-test, and Cohen's dz effect size was used to interpret the findings against the large sample effect. Considering the limitations of the study, the results show that the pedal effect produced medium and above effect sizes, particularly in spectral slope, maximum autocorrelation, and low-order MFCC coefficients. The findings suggest candidate inputs for pedal detection and explainable feature-based models.

Anahtar kelimeler
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Bu Makaleye Atıf Yap

Yücel, İ. E. (2026). Pianoda Sustain Pedal Etkisinin Ses Özniteliklerine Dayalı Karşılaştırmalı Analizi. Konservatoryum, Cilt: 13 Sayı: 1, 58–72. https://doi.org/10.26650/CONS2026-1904180

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