eSpeak NG is an open source speech synthesizer that supports more than hundred languages and accents.
This report summarizes scanner evidence for espeak-ng/espeak-ng, a C project with 6,987 GitHub stars. SynthScan examined 79,854 lines of code across 316 source files, recording 190 pattern matches distributed across 6 syntactic categories. The legacy adjusted pattern signal is 3.2 (Low pattern signal); it is not an authorship estimate.
Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.
Use each vector to guide manual verification of the underlying findings.
Payload schema: 1.0.0 · Engine: 2.0.0 · Scoring: heuristic-density-v1 · Scan date: 2026-10-31.
Can maintainers explain intent, assumptions, and trade-offs? 156 finding(s).
Are imports declared and package/API names verified? 19 finding(s).
Are wrappers, guards, and repeated structures necessary? 15 finding(s).
Which changes need focused human review? 190 finding(s).
This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.
Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.
This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.
The scanner identified 190 distinct pattern matches across 6 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.
Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | tests/api.c | 21 | COMMENT | |
| LOW | tests/readclause.c | 21 | COMMENT | |
| LOW | tests/fuzzing/create_dict_corpus_file.py | 1 | #!/bin/python3 | COMMENT |
| LOW | android/remove_string.sh | 1 | #!/bin/bash | COMMENT |
| LOW | android/eSpeakTests/proguard-project.txt | 1 | # To enable ProGuard in your project, edit project.properties | COMMENT |
| LOW | android/jni/include/config.h | 1 | // This is created by autoconf on POSIX-compatibe build environments. | COMMENT |
| LOW | android/jni/include/Log.h | 21 | COMMENT | |
| LOW | …com/reecedunn/espeak/preference/SeekBarPreference.java | 281 | // 1. Pressing the OK (positive) button. | COMMENT |
| LOW | src/espeak-ng.c | 21 | COMMENT | |
| LOW | src/speak-ng.cpp | 1 | #include "speak-ng.c" | COMMENT |
| LOW | src/libespeak-ng/dictionary.c | 21 | COMMENT | |
| LOW | src/libespeak-ng/compiledata.c | 21 | COMMENT | |
| LOW | src/libespeak-ng/speech.c | 21 | COMMENT | |
| LOW | src/libespeak-ng/speech.c | 41 | #include <fcntl.h> | COMMENT |
| LOW | src/libespeak-ng/speech.c | 541 | COMMENT | |
| LOW | src/libespeak-ng/common.c | 21 | COMMENT | |
| LOW | src/libespeak-ng/fifo.h | 21 | COMMENT | |
| LOW | src/libespeak-ng/fifo.h | 61 | // | COMMENT |
| LOW | src/libespeak-ng/synthesize.h | 21 | #define ESPEAK_NG_SYNTHESIZE_H | COMMENT |
| LOW | src/libespeak-ng/synthesize.h | 41 | #define FRFLAG_KLATT 0x01 // this frame includes extra data for Klatt synthesizer | COMMENT |
| LOW | src/libespeak-ng/synthesize.h | 61 | COMMENT | |
| LOW | src/libespeak-ng/synthesize.h | 81 | #define N_KLATTP 10 // this affects the phoneme data file format | COMMENT |
| LOW | src/libespeak-ng/synthesize.h | 261 | // instructions | COMMENT |
| LOW | src/libespeak-ng/synthesize.h | 281 | #define i_CHANGE_IF 0x10 // 0x10 to 0x14 | COMMENT |
| LOW | src/libespeak-ng/synthesize.h | 301 | #define i_WAV 0xc000 | COMMENT |
| LOW | src/libespeak-ng/synthesize.h | 321 | #define isAfterStress 9 | COMMENT |
| LOW | src/libespeak-ng/synthesize.h | 401 | extern const unsigned char env_fall[128]; | COMMENT |
| LOW | src/libespeak-ng/ssml.c | 21 | COMMENT | |
| LOW | src/libespeak-ng/langopts.c | 21 | #include "config.h" | COMMENT |
| LOW | src/libespeak-ng/translate.h | 21 | #define ESPEAK_NG_TRANSLATE_H | COMMENT |
| LOW | src/libespeak-ng/translate.h | 41 | #define N_WORD_BYTES 160 // max bytes for the UTF8 characters in a word | COMMENT |
| LOW | src/libespeak-ng/translate.h | 61 | #define FLAG_DOUBLING 0x4000 // doubles the following consonant | COMMENT |
| LOW | src/libespeak-ng/translate.h | 81 | // dictionary flags, word 2 | COMMENT |
| LOW | src/libespeak-ng/translate.h | 101 | COMMENT | |
| LOW | src/libespeak-ng/translate.h | 121 | #define FLAG_DONT_SWITCH_TRANSLATOR 0x1000 | COMMENT |
| LOW | src/libespeak-ng/translate.h | 141 | #define SUFX_I 0x0200 // y may have been changed to i | COMMENT |
| LOW | src/libespeak-ng/translate.h | 161 | #define RULE_POST 2 | COMMENT |
| LOW | src/libespeak-ng/translate.h | 181 | #define RULE_SYLLABLE 21 // @ | COMMENT |
| LOW | src/libespeak-ng/translate.h | 201 | #define LETTERGP_C 2 | COMMENT |
| LOW | src/libespeak-ng/translate.h | 221 | #define CLAUSE_INTONATION_COMMA 0x00001000 | COMMENT |
| LOW | src/libespeak-ng/translate.h | 241 | #define CLAUSE_EXCLAMATION (45 | CLAUSE_INTONATION_EXCLAMATION | CLAUSE_TYPE_SENTENCE) | COMMENT |
| LOW | src/libespeak-ng/translate.h | 281 | #define AL_NOT_LETTERS 0x02 // don't use the language for speaking letters | COMMENT |
| LOW | src/libespeak-ng/translate.h | 301 | // bit 4=LANG=cz,sk don't propagate to [v] | COMMENT |
| LOW | src/libespeak-ng/translate.h | 321 | COMMENT | |
| LOW | src/libespeak-ng/translate.h | 341 | // recognize long vowels (0 = don't recognize) | COMMENT |
| LOW | src/libespeak-ng/translate.h | 361 | #define STRESSPOSN_1RH 6 // last heaviest syllable, excluding final syllable | COMMENT |
| LOW | src/libespeak-ng/translate.h | 381 | // bit1=don't set diminished stress, | COMMENT |
| LOW | src/libespeak-ng/translate.h | 401 | #define S_FINAL_SPANISH 0x200 | COMMENT |
| LOW | src/libespeak-ng/translate.h | 441 | #define NUM_SWAP_TENS 0x00000010 // use three-and-twenty rather than twenty-three | COMMENT |
| LOW | src/libespeak-ng/translate.h | 461 | #define NUM_ROMAN_AFTER 0x04000000 // say "roman" after the number, not before | COMMENT |
| LOW | src/libespeak-ng/translate.h | 481 | #define NUM2_ENGLISH_NUMERALS 0x00008000 // speak (non-replaced) English numerals in English | COMMENT |
| LOW | src/libespeak-ng/translate.h | 501 | // Bit 2^n is set if 10^n separates a number grouping (max n=31). | COMMENT |
| LOW | src/libespeak-ng/klatt.c | 21 | * along with this program; if not, see: <http://www.gnu.org/licenses/>. | COMMENT |
| LOW | src/libespeak-ng/synth_mbrola.c | 21 | COMMENT | |
| LOW | src/libespeak-ng/synth_mbrola.c | 41 | COMMENT | |
| LOW | src/libespeak-ng/phoneme.h | 121 | // length | COMMENT |
| LOW | src/libespeak-ng/phoneme.h | 141 | #define phVIRTUAL 9 | COMMENT |
| LOW | src/libespeak-ng/phoneme.h | 161 | #define phFLAGBIT_VOICELESS 3 | COMMENT |
| LOW | src/libespeak-ng/phoneme.h | 181 | #define phVOICELESS (1U << phFLAGBIT_VOICELESS) | COMMENT |
| LOW | src/libespeak-ng/phoneme.h | 201 | #define phonSTRESS_D 3 | COMMENT |
| 90 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | src/ucd-tools/data/espeak-ng/emoji-data.txt | 34 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/emoji-data.txt | 55 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/emoji-data.txt | 102 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 20 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 55 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 79 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 100 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 129 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 146 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 164 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 174 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 185 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 193 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 210 | # ================================================ | COMMENT |
| MEDIUM | src/ucd-tools/data/espeak-ng/PropList.txt | 217 | # ================================================ | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| HIGH | src/ucd-tools/tools/printdata.py | 108 | elif data.get('LowerCase', null) != null: # Some Lt characters have lowercase forms. | CODE |
| HIGH | src/ucd-tools/tools/printdata.py | 116 | elif data.get('UpperCase', null) != null: | CODE |
| HIGH⚡ | src/ucd-tools/tools/printdata.py | 194 | if title == null: title = codepoint | CODE |
| HIGH⚡ | src/ucd-tools/tools/printdata.py | 195 | if upper == null: upper = codepoint | CODE |
| HIGH⚡ | src/ucd-tools/tools/printdata.py | 196 | if lower == null: lower = codepoint | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | src/ucd-tools/tools/ucd.py | 5 | # This file is part of ucd-tools. | COMMENT |
| MEDIUM | src/ucd-tools/tools/printdata.py | 5 | # This file is part of ucd-tools. | COMMENT |
| MEDIUM | src/ucd-tools/tools/categories.py | 5 | # This file is part of ucd-tools. | COMMENT |
| MEDIUM | src/ucd-tools/tools/case.py | 5 | # This file is part of ucd-tools. | COMMENT |
| MEDIUM | src/ucd-tools/tools/scripts.py | 5 | # This file is part of ucd-tools. | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | tests/fuzzing/create_dict_corpus_file.py | 19 | CODE | |
| LOW | tests/fuzzing/create_dict_corpus_file.py | 21 | CODE | |
| LOW | tests/fuzzing/create_dict_corpus_file.py | 23 | CODE | |
| LOW | tests/fuzzing/create_dict_corpus_file.py | 23 | CODE | |
| LOW | tests/fuzzing/create_dict_corpus_file.py | 23 | CODE | |
| LOW | tests/fuzzing/create_dict_corpus_file.py | 23 | CODE | |
| LOW | tests/fuzzing/create_dict_corpus_file.py | 23 | CODE | |
| LOW | tests/fuzzing/create_dict_corpus_file.py | 23 | CODE | |
| LOW | tests/fuzzing/create_dict_corpus_file.py | 23 | CODE | |
| LOW | tests/fuzzing/create_dict_corpus_file.py | 23 | CODE | |
| LOW | src/ucd-tools/tools/printdata.py | 20 | CODE | |
| LOW | src/ucd-tools/tools/categories.py | 20 | CODE | |
| LOW | src/ucd-tools/tools/case.py | 20 | CODE | |
| LOW | src/ucd-tools/tools/scripts.py | 20 | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | src/ucd-tools/tools/ucd.py | 165 | CODE |