{"id":"d8c7b69d-65bb-4f57-a999-3a4f31775de8","arxiv_id":"2505.08571","paper_version":1,"verdict":"CONDITIONAL","confidence":"MODERATE","novelty_score":4.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":0,"one_line_summary":"Drummers hit acoustic and electronic drums with similar wrist and elbow speeds, but electronic drums produce significantly lower sound levels, a gesture-sound disconnect that may raise musculoskeletal injury risk.","lead":"This study measured how drummers move and how loud their hits sound when playing acoustic versus electronic drums. It found that electronic drums produce less sound for the same arm speed, a disconnect that may help explain why switching to electronic drums can increase injury risk.","discovery_kind":"new_application","skeptic_critique":{"model":"deepseek-v4-flash","headline":"The 'similar striking speed' premise rests on an underpowered null: with n=3 and no equivalence bounds or confidence intervals, the central gesture-sound decorrelation inference is not established.","rationale":"The Reader's weakest_assumption already identifies this issue, and my read agrees and sharpens it. The paper's headline contribution is a decorrelation claim built on a null result: the sound-level difference is only meaningful as 'gesture-sound decorrelation' if the gesture is demonstrably the same. The absence of equivalence testing with n=3 is the single most load-bearing weak point because it directly undermines the 'despite similar striking speed' premise, not merely a secondary detail. I would not change the CONDITIONAL verdict: the paper remains a plausible preliminary report, but the condition should explicitly require an equivalence analysis or a larger sample before the similar-kinematics premise is accepted. The proposed TOST check is inexpensive and can be run on the existing extracted angular-velocity values, making it the decisive next step.","tokens_in":8668,"tokens_out":13292,"duration_ms":146601,"concrete_test":"Compute 90% confidence intervals for the acoustic-vs-electronic difference in peak wrist and elbow angular velocities from the Figure 5 data and run a two-one-sided t-test (TOST) with equivalence bounds pre-set to, e.g., ±20% of the acoustic mean or ±0.5 rad/s. If the interval lies entirely inside the bounds, the similarity premise is supported; if it straddles the bounds (as expected with n=3), the current data cannot support the central decorrelation claim.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The central claim requires that upper-limb striking kinematics are actually similar between acoustic and electronic drums, because 'despite a similar striking speed' is what turns the observed sound-level difference into a gesture-sound decorrelation. Section 3.2 reports no significant effect of battery type on wrist or elbow peak angular velocity, but this is a classic absence-of-evidence problem. Only three participants were tested, and the paper reports no effect sizes, confidence intervals, or equivalence bounds for the battery-type comparison. The piano/forte contrast produced up to 3x differences with p<0.001, showing that the pipeline can detect large effects; the null battery-type result is therefore uninformative about whether the two instruments produce mechanically meaningful kinematic differences. The paper's own limitation section acknowledges the small sample, yet the conclusion 'malgré une vitesse de frappe similaire' is still used as a load-bearing premise. Statistical equivalence must be demonstrated with pre-specified bounds before the decorrelation claim can be evaluated.","agreement_with_reader":"agree"},"referee_report":{"model":"deepseek-v4-flash","summary":"This conference paper tests whether playing an electronic drum kit decorrelates the striking gesture from the sound it produces. Three experienced drummers (all trained on acoustic drums) played a repeated five-measure snare-drum pattern at 100 BPM under eight conditions crossing instrument (acoustic snare drum vs. Yamaha DD-75 electronic pad), auditory feedback (sound on vs. sound off with headphones), and dynamics (piano vs. forte). Maximal dBA sound level was recorded with a sound-level meter; right wrist and elbow angular velocities were extracted from 60 Hz smartphone video using OpenPose markerless tracking; Likert questionnaires and self-confrontation interviews complemented the quantitative data. The authors report significantly lower maximal sound levels for the electronic kit (p<0.001) and non-significant kinematic differences between instrument types, and they interpret this combination as a gesture-sound decorrelation that could explain the increased musculoskeletal disorder risk reported among drummers switching to electronic instruments.","tokens_in":8807,"tokens_out":14133,"duration_ms":132685,"significance":"The research question is timely and understudied: drummers face high rates of playing-related musculoskeletal disorders, and the hypothesis that electronic kits decorrelate gesture from sound is mechanistically plausible but, to my knowledge, has not been directly tested. Strengths of the manuscript include the use of markerless video-based motion capture for drumming kinematics (stated to be a first in this domain); the multi-method design combining kinematics, sound, questionnaires, and self-confrontation interviews; the within-subject 2x2x2 design; and the authors' candid acknowledgment of their measurement limitations. The ancillary piano/forte result (up to threefold angular-velocity differences, p<0.001) is a useful internal control showing that the kinematic pipeline can resolve large effects. The paper ships no data or code, however, and the central inference currently exceeds what the evidence supports: the study is best read as hypothesis-generating.","major_comments":[{"comment":"The central claim of a gesture-sound decorrelation rests on the premise that striking kinematics are similar on acoustic and electronic drums, but that premise is supported only by a non-significant battery-type effect in wrist and elbow angular velocities measured from three participants. Section 3.2 reports no equivalence bounds, effect sizes, or confidence intervals for the acoustic-versus-electronic comparison, and a null p-value cannot establish similarity; the authors themselves acknowledge the small sample ('le nombre trop faible de sujets') in Section 4. Because the phrase 'malgré une vitesse de frappe similaire' in the Abstract is what converts the observed sound difference into a decorrelation, the manuscript should either provide a formal equivalence analysis (for example, two one-sided tests with bounds anchored to the piano/forte contrast, which produced up to threefold differences) or explicitly restate the conclusion as a hypothesis consistent with, but not established by, the data. In addition, the manuscript never directly tests the gesture-sound link: the 'decorrelation' label is inferred from two separate significance tests rather than from, say, an instrument-by-dynamics interaction on sound or a test of whether the sound difference persists after controlling for angular velocity.","section":"Abstract; Section 3.2; Section 4"},{"comment":"The sound outcome is a single maximal-dBA reading per acquisition from a sound-level meter, so the measured values cannot be attributed to individual strikes; the authors acknowledge this in Section 4 and further note that stick clicks may have inflated some piano-condition readings. This matters because the 'lower sound power of electronic drums' is the second leg of the decorrelation claim: the direction of the battery effect (p<0.001) is plausible and would only be strengthened if stick-click noise inflates the quieter condition, but the magnitude of the acoustic-electronic difference is not quantitatively established, and the assumed proportionality between sound level and striking force on the acoustic kit is not verified by any force or acceleration measurement. Please report per-strike sound levels or a validated per-trial summary, and quantify the potential stick-click contamination.","section":"Section 2.3; Section 3.1"},{"comment":"The statistical methods are under-specified in a way that affects every reported p-value. The text says a 'T-test' was applied to data from 'les 3 conditions d'acquisition,' although the design is 2x2x2 (eight conditions), and it is not stated whether the three identified strikes per trial were pooled (which would pseudo-replicate within participants), whether data were averaged per subject, whether the tests were paired, or whether the tests on the three factors (battery, headphone, nuance) were multiplicity-corrected. Specifying the statistical model, the unit of analysis, and the number of observations per cell is necessary before the non-significant kinematic battery-type effect can be interpreted at all.","section":"Section 2.3 (statistical analysis)"}],"minor_comments":[{"comment":"The in-text figure references do not match the captions: Section 3.1 cites 'Figure 2' for sound levels while the Figure 2 caption describes the strike-identification interface, Section 2.3 cites 'Figure 3' for the interface while the Figure 3 caption describes OpenPose tracking, and Section 2.3 cites 'Figure 4' for OpenPose while the Figure 4 caption describes sound levels; the numbering or the captions should be corrected.","section":"Figures 2-4"},{"comment":"'Lickert' should be spelled 'Likert' in the two rows of Table 2, and the statistical test should be identified as a Student's t-test (or a nonparametric alternative) with the paired or unpaired nature specified.","section":"Table 2"},{"comment":"The abstract refers to 'casque anti-bruit' (noise-canceling headphones) while Table 1 lists 'casque de protection' (protective headphones); the same apparatus should be described consistently.","section":"Abstract; Table 1"},{"comment":"Reference [25] (Bernstein, The co-ordination and regulation of movements) is garbled: it cites a 1967 Pergamon volume but the URL points to a 1969 Brain Research article; please correct the bibliographic data.","section":"References"},{"comment":"The result that forte playing produced angular velocities 'jusqu'à 3 fois plus rapide' should state the direction explicitly (forte faster than piano) and report the actual means and dispersions, since the figure panels are not legible in the manuscript text.","section":"Section 3.2"},{"comment":"The rationale for analyzing only the three selected strikes (the first strike of measures 2 and 3 and the last strike of measure 5) is not explained.","section":"Section 2.3"}],"recommendation":"major_revision","confidential_remarks":"This is a four-page conference proceedings contribution, which may explain the brevity of the statistical section, but the load-bearing 'similar striking speed' premise is presented as an established result rather than as an underpowered comparison. I would encourage the editor to require either a formal equivalence analysis or a substantial tempering of the abstract and conclusion; without one of these, the central claim exceeds what the data support. No data or code availability statement is included, which limits reproducibility assessment, but the self-citations used for method validation are appropriate."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"This is a small pilot with a plausible but unproven central claim: electronic drums are quieter than acoustic drums even though upper-limb kinematics look similar. The genuinely new piece is the use of markerless motion capture (OpenPose) to study drumming kinematics and the explicit acoustic-versus-electronic comparison with synchronized sound and movement. That has not been done in the cited literature. The authors are also honest: they openly list several limitations, including the small sample, the sonometer's max mode not being attributable to specific strikes, and possible overestimation of piano trials from stick clicks. The sound-level difference between the two battery types is large and significant (p<0.001), and the piano/forte contrast shows the pipeline can pick up large effects, so the sound part is credible as a pilot.\n\nThe soft spots are real and they hit the central inference. With three participants, the absence of a significant difference in wrist or elbow angular velocity between acoustic and electronic drums is not evidence of similarity. The paper reports no effect sizes, confidence intervals, or equivalence bounds, so the phrase 'despite a similar striking speed' is a load-bearing premise that is not established. The authors also told subjects to adjust the electronic drum's volume to make it sound 'similar' to the acoustic—one subject hit the max potentiometer—which makes the sound comparison useful but harder to interpret as a clean physical decoupling. The statistical reporting is thin: raw t-tests and Wilcoxon, no correction for multiple comparisons, no discussion of distribution or effect sizes. That is common for a short conference paper, but it limits how much weight the results can carry. The MSD speculation at the end is properly labeled as speculation, and the one experienced subject's interview is anecdotal. The self-citations are used for method validation and are not a problem.\n\nI do not think the paper is misleading; it is a preliminary study that knows its limits. But the central claim, as worded, goes beyond the evidence. The paper deserves peer review as a pilot, with an explicit request for equivalence testing or a larger sample, and a revised conclusion that treats the gesture-sound decorrelation as a hypothesis, not a finding.","headline":"A small, honest pilot with a novel markerless motion-capture application, but the central 'similar striking speed' premise rests on an underpowered null with n=3 and no equivalence testing.","tokens_in":9340,"tokens_out":1990,"would_cite":false,"duration_ms":20881,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"Same hits, less sound: electronic drums decouple gesture from tone","keywords":["electronic drums","gesture-sound decorrelation","musculoskeletal disorders","drumming kinematics","markerless motion capture","OpenPose","joint angular velocity","acoustic vs electronic instruments"],"falsifier":"Perform a pre-registered equivalence test on peak wrist and elbow angular velocities between acoustic and electronic snare drumming with at least 20 drummers. If the equivalence bounds (e.g., ±10% of the acoustic mean) are not met, or if the electronic drum's maximum dBA is not significantly lower at the same perceived effort, the gesture-sound decorrelation claim fails.","tokens_in":8451,"feed_emoji":"🥁","tokens_out":9498,"duration_ms":86907,"temperature":0.7,"pith_summary":"The paper asks whether playing an electronic drum kit changes how drummers strike the instrument. It reports that electronic drums produce significantly lower maximum sound levels than acoustic drums at the same dynamic marking, even though the drummers' wrist and elbow angular velocities—the measurable speed of the hit—are not statistically different between the two instruments. The authors describe this as a gesture-sound decorrelation: on an acoustic drum, a louder sound means a harder hit, but on an electronic pad the two can diverge. If this finding holds, it matters because drummers who switch to electronic kits for quiet practice may unknowingly strike harder and more precisely to reproduce the acoustic feel, raising the mechanical load on their upper limbs and the risk of musculoskeletal disorders.","feed_headline":"Same hits, less sound: electronic drums decouple gesture from tone","feed_subtitle":"If the pattern holds, switching to a quiet kit could push players to strike harder and raise injury risk.","key_machinery":"The central mechanism is 'gesture-sound decorrelation': the loss of the acoustic drum's tight coupling between strike force and sound intensity. To make that decorrelation visible, the study pairs a sound-level meter with markerless 2D pose estimation (OpenPose) to extract elbow and wrist angular velocities for every strike, then compares those kinematic and acoustic measurements across instrument type, dynamic nuance, and the presence of auditory feedback. This pipeline makes the decorrelation observable in a single protocol.","core_discovery":"The core claim is that on an electronic drum kit, the natural proportionality between striking effort and sound output is broken. Using a smartphone camera, markerless pose estimation, and a sound-level meter, the authors compared a snare-drum pattern played by three experienced drummers on an acoustic snare and on a Yamaha Multi Pad DD-75, at piano and forte dynamics and with and without noise-canceling headphones. Sound pressure was significantly lower on the electronic pad (p<0.001) even though participants had been asked to set its volume so that it 'would sound like the acoustic drum for the same hit.' Peak angular velocities of the wrist and elbow did not differ significantly between the two instruments, while the forte/piano contrast changed them by up to a factor of three. The authors interpret the combination—same measurable gesture speed, quieter result—as a decorrelation of gesture and sound, and propose that it could drive drummers to increase strike force on the pad, thereby increasing upper-limb joint loading and the likelihood of playing-related musculoskeletal disorders.","pith_inferences":["This is a proof-of-concept rather than an epidemiological result; with three participants, the absence of a kinematic difference is best read as a tentative suggestion, and a larger study using equivalence tests could confirm or refute the claim that the gestures are genuinely matched.","The same measurement strategy could be extended to practice pads and other trigger-based instruments, such as electronic mallet percussion or drum triggers, to see whether the decorrelation is specific to this pad or a general feature of trigger-based sound production.","A directional hypothesis follows: as drummers play longer on electronic kits, their strike velocity—and hence joint loading—may trend upward as they unconsciously chase the acoustic feedback they expect; a longitudinal recording of pad strikes over weeks would test this.","The paper's perceptual dimension suggests that restoring a non-auditory feedback channel, such as a visual level meter or a haptic pad response, could reduce the tendency to overstrike without requiring loud acoustic practice."],"forward_implications":["If the finding is correct, drummers practicing on electronic kits without a monitor or sound system will tend to hit the pad harder than they would an acoustic snare to reach the same perceived loudness, increasing joint loading.","The non-significant difference in joint angular velocities across instrument types suggests that experienced drummers do not spontaneously adapt their striking kinematics to the pad; the adaptation is made by force or amplitude, which they feel as a need for extra precision and fatigue.","Because auditory feedback (headphones on/off) had no measurable effect on either sound level or kinematics, the decorrelation does not depend on whether the player hears the instrument directly; it is a property of the electronic pad's response to an unchanged gesture.","The study's use of peak elbow and wrist angular velocity as the kinematic benchmark implies that interventions or instrument designs aimed at preventing musculoskeletal disorders should address the instrument's force-to-sound transfer function, not just overall loudness."],"supporting_citations":[{"why":"Establishes that formal drum training can reduce playing-related musculoskeletal disorders, grounding the relevance of MSD in drummers.","marker":"[3]"},{"why":"Documents the rates and patterns of playing-related musculoskeletal disorders in drummers, the population the study targets.","marker":"[11]"},{"why":"Provides injury-prevention considerations for drum kit performance, supporting the claim that higher mechanical load raises MSD risk.","marker":"[12]"},{"why":"Supplies the ergonomic principle that a change of tool without new training creates a mismatch between the worker's gesture and the activity.","marker":"[15]"},{"why":"Demonstrates that visual motion alters perceived tone duration, showing that gesture and sound are perceptually coupled.","marker":"[17]"},{"why":"OpenPose is the markerless pose-estimation software used to extract elbow and wrist joint trajectories from the videos.","marker":"[18]"},{"why":"Validates markerless against marker-based motion analysis, backing the reliability of the kinematic measurements.","marker":"[19]"},{"why":"Prior motion analysis of snare drum playing serves as precedent for limiting the study to the snare-drum stroke.","marker":"[20]"}],"fun_headline_variants":["E-drum decoupling: same hit, softer sound, higher injury risk","Electronic drums break force-sound link, may prompt harder hits","Same stroke, quieter beat: e-drums distort force feedback","Quiet e-kits may push drummers to strike harder, raising MSD risk","Decoupled drums: effort and volume diverge on electronic kits"],"cache_read_input_tokens":3200,"weakest_assumption_plain":"The central interpretation rests on treating the absence of a significant difference in wrist and elbow angular velocities between acoustic and electronic drums—measured in only three drummers—as evidence that the striking gesture is genuinely the same, rather than merely not detectably different.","fun_headline_variants_meta":{"raw":{"variants":["E-drum decoupling: same hit, softer sound, higher injury risk","Electronic drums break force-sound link, may prompt harder hits","Same stroke, quieter beat: e-drums distort force feedback","Quiet e-kits may push drummers to strike harder, raising MSD risk","Decoupled drums: effort and volume diverge on electronic kits"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000615,"raw_usage":{"total_tokens":2898,"prompt_tokens":1027,"completion_tokens":1871,"prompt_tokens_details":{"cached_tokens":384},"prompt_cache_hit_tokens":384,"prompt_cache_miss_tokens":643,"completion_tokens_details":{"reasoning_tokens":1777}},"tokens_in":643,"tokens_out":1871,"duration_ms":14459,"temperature":1.0,"reasoning_tokens":1777,"cache_read_input_tokens":384,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-15T21:50:08.732686+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"Perform a pre-registered equivalence test on peak wrist and elbow angular velocities between acoustic and electronic snare drumming with at least 20 drummers. If the equivalence bounds (e.g., ±10% of the acoustic mean) are not met, or if the electronic drum's maximum dBA is not significantly lower at the same perceived effort, the gesture-sound decorrelation claim fails.","supporting_citations":[{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Establishes that formal drum training can reduce playing-related musculoskeletal disorders, grounding the relevance of MSD in drummers."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Documents the rates and patterns of playing-related musculoskeletal disorders in drummers, the population the study targets."},{"cited_title":"Leplat, « Les gestes dans l’activité en situation de travail », Perspectives interdisciplinaires sur le travail et la santé , no 15‑1, Art","cited_arxiv_id":null,"evidence_quote":"Supplies the ergonomic principle that a change of tool without new training creates a mismatch between the worker's gesture and the activity."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Demonstrates that visual motion alters perceived tone duration, showing that gesture and sound are perceptually coupled."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"OpenPose is the markerless pose-estimation software used to extract elbow and wrist joint trajectories from the videos."},{"cited_title":"Simonet et S","cited_arxiv_id":null,"evidence_quote":"Validates markerless against marker-based motion analysis, backing the reliability of the kinematic measurements."},{"cited_title":"Mutio, F","cited_arxiv_id":null,"evidence_quote":"Prior motion analysis of snare drum playing serves as precedent for limiting the study to the snare-drum stroke."}],"review_version":1}