Voice Tests https://podcast.carverupton.com/voicetests en-us Piper TTS voice comparison samples, all synthesizing the same short source text. carver carver.upton@gmail.com false https://podcast.carverupton.com/voicetests/cover.jpg Voice Tests https://podcast.carverupton.com/voicetests Wed, 14 Oct 2026 22:33:50 +0000 Vitamin D may treat (opioid) "addiction" -- parens +5dB, "link here" now quoted voicetest-1551-boosted-filter-v3 Wed, 14 Oct 2026 22:33:50 +0000 00:04:38 false Vitamin D may treat (opioid) "addiction" -- parens +6dB / quotes +4dB voicetest-1551-boosted-filter-v2 Wed, 14 Oct 2026 22:29:40 +0000 00:04:37 false Vitamin D may treat (opioid) "addiction" -- 1800Hz/400-3400Hz filter + volume boost voicetest-1551-boosted-filter Wed, 14 Oct 2026 22:27:18 +0000 00:04:37 false Current (for comparison): parens 1500Hz lowpass, quotes 500-2800Hz band voicetest-current-1500-500-2800 Wed, 14 Oct 2026 14:12:18 +0000 00:00:19 false Less intense v2: parens 2000Hz lowpass, quotes 400-3400Hz band voicetest-lessintense-2000-400-3400 Wed, 14 Oct 2026 14:12:17 +0000 00:00:19 false Less intense v1: parens 1800Hz lowpass, quotes 400-3200Hz band voicetest-lessintense-1800-400-3200 Wed, 14 Oct 2026 14:12:16 +0000 00:00:19 false OLD plain-text respellings (pre-phoneme) -- compare against the IPA batch voicetest-old-respellings Wed, 14 Oct 2026 13:31:21 +0000 00:01:03 false Vitro: stress moved to first syllable (VEE-troh) voicetest-vitro-stress1 Wed, 14 Oct 2026 13:14:48 +0000 00:00:01 false Denature option: dɪˈnɛʔtʃər (eh with a glottal stop to cut it short) voicetest-denature-glottal Wed, 14 Oct 2026 13:13:48 +0000 00:00:02 false Denature option: dɪˈnətʃər (dee-nuh-chur (schwa)) voicetest-denature-schwa Wed, 14 Oct 2026 13:13:47 +0000 00:00:02 false Denature option: dɪˈneɪtʃər (dee-NAY-chur diphthong (standard real-world pronunciation)) voicetest-denature-ay Wed, 14 Oct 2026 13:13:46 +0000 00:00:02 false Denature option: dɪˈnɛtʃər (current (eh vowel, sounds drawn out per user)) voicetest-denature-stress-same Wed, 14 Oct 2026 13:13:45 +0000 00:00:02 false CoA option: ˈkoʊɛʔ (koh-eh with a glottal stop to cut it short) voicetest-coa-short-e Wed, 14 Oct 2026 13:13:33 +0000 00:00:02 false CoA option: ˈkoʊə (koh-uh (schwa ending)) voicetest-coa-schwa Wed, 14 Oct 2026 13:13:32 +0000 00:00:02 false CoA option: ˈkoʊeɪ (koh-AY diphthong (common real-world CoA pronunciation)) voicetest-coa-ay Wed, 14 Oct 2026 13:13:31 +0000 00:00:02 false CoA option: koʊˈɛ (stress on 2nd syllable, same eh vowel) voicetest-coa-stress2 Wed, 14 Oct 2026 13:13:30 +0000 00:00:02 false Full word-list converted to IPA phonemes (PUFA, GABA, CoA, taurine, estrone/estriol, etc) voicetest-phoneme-batch Wed, 14 Oct 2026 13:10:16 +0000 00:00:22 false Pregnenolone via IPA phoneme (preg-NEE-nuh-lone, stress fixed) voicetest-pregnenolone-ipa Wed, 14 Oct 2026 11:40:47 +0000 00:00:05 false FINAL (production code): parens low-pass 1.5kHz, quotes telephone 500-2800Hz voicetest-pvq-production-final Tue, 13 Oct 2026 19:25:40 +0000 00:00:09 false Parens low-pass 1.5kHz vs quotes telephone 800-2200Hz (narrowest) voicetest-pvq-tel-800-2200 Tue, 13 Oct 2026 19:18:17 +0000 00:00:26 false Parens low-pass 1.5kHz vs quotes telephone 600-2500Hz (narrower still) voicetest-pvq-tel-600-2500 Tue, 13 Oct 2026 19:18:16 +0000 00:00:26 false Parens low-pass 1.5kHz vs quotes telephone 500-2800Hz (narrower) voicetest-pvq-tel-500-2800 Tue, 13 Oct 2026 19:18:15 +0000 00:00:26 false Parens low-pass 1.5kHz vs quotes telephone 300-3400Hz (previous winner, for reference) voicetest-pvq-tel-300-3400 Tue, 13 Oct 2026 19:18:14 +0000 00:00:26 false Parens low-pass 2.5kHz vs quotes pitched up slightly (tests voice-change feel) voicetest-pvq-lowpass-vs-pitchup Tue, 13 Oct 2026 19:10:08 +0000 00:00:26 false Parens low-pass 2.5kHz vs quotes simply quieter (-6dB, no EQ change) voicetest-pvq-lowpass-vs-quiet Tue, 13 Oct 2026 19:10:07 +0000 00:00:26 false Parens low-pass 2.5kHz vs quotes telephone band-pass (300-3400Hz) voicetest-pvq-lowpass-vs-telephone Tue, 13 Oct 2026 19:10:06 +0000 00:00:26 false Parens deep low-pass 1.5kHz vs quotes thin high-pass 2.8kHz (more extreme) voicetest-pvq-deep-lowpass-vs-thin-highpass Tue, 13 Oct 2026 19:10:05 +0000 00:00:26 false Parens low-pass 2.5kHz (muffled) vs quotes high-pass 2kHz (thin/tinny) voicetest-pvq-lowpass-vs-highpass Tue, 13 Oct 2026 19:10:04 +0000 00:00:26 false Baseline: parens and quotes both low-pass 2.5kHz (current, identical) voicetest-pvq-baseline Tue, 13 Oct 2026 19:10:03 +0000 00:00:26 false CoQ10 as "coh cue 10" (separate words, no break tag) voicetest-coq10-sepwords Sun, 11 Oct 2026 21:48:04 +0000 00:00:02 false CoQ10 with small pause before "10" (v3, 30ms) voicetest-coq10-pause-v3 Sun, 11 Oct 2026 21:45:59 +0000 00:00:02 false CoQ10 with small pause before "10" (v2, 50ms) voicetest-coq10-pause-v2 Sun, 11 Oct 2026 21:45:01 +0000 00:00:02 false CoQ10 with small pause before "10" voicetest-coq10-pause Sun, 11 Oct 2026 21:41:09 +0000 00:00:05 false haidut.me pronunciation fix voicetest-haidutme-fix Sun, 11 Oct 2026 21:38:05 +0000 00:00:04 false Slash test: and/or voicetest-slash-andor Sun, 11 Oct 2026 21:30:52 +0000 00:00:03 false Slash test: LH/FSH voicetest-slash-lhfsh Sun, 11 Oct 2026 21:30:51 +0000 00:00:05 false CoQ10 pronunciation (final: SSML/IPA) voicetest-coq10-final-ssml Sun, 11 Oct 2026 21:19:21 +0000 00:00:10 false CoQ10 variant: SSML IPA phoneme (most precise) voicetest-coq10-ssml-ipa Sun, 11 Oct 2026 21:14:06 +0000 00:00:02 false CoQ10 variant: "COH-cue-tin every morning." voicetest-coq10-v-cozy Sun, 11 Oct 2026 21:14:00 +0000 00:00:03 false CoQ10 variant: "koh cue tin every morning." voicetest-coq10-v-nohyphen Sun, 11 Oct 2026 21:13:59 +0000 00:00:02 false CoQ10 variant: "coh kyoo tin every morning." voicetest-coq10-v-cokyoo Sun, 11 Oct 2026 21:13:58 +0000 00:00:02 false CoQ10 variant: "kohh-cue-tin every morning." voicetest-coq10-v-kohh Sun, 11 Oct 2026 21:13:57 +0000 00:00:02 false CoQ10 variant: "koh-cue-tin every morning." voicetest-coq10-v-koh Sun, 11 Oct 2026 21:13:56 +0000 00:00:02 false Hyphen fix: Ki-67 voicetest-hyphen-ki67-fixed Sun, 11 Oct 2026 21:11:01 +0000 00:00:04 false Hyphen fix: Bcl-2 voicetest-hyphen-bcl2-fixed Sun, 11 Oct 2026 21:11:00 +0000 00:00:05 false Hyphen fix: 5-HTergic voicetest-hyphen-5htergic-fixed Sun, 11 Oct 2026 21:10:59 +0000 00:00:05 false Hyphen fix: microRNA-93 voicetest-hyphen-microrna93-fixed Sun, 11 Oct 2026 21:10:58 +0000 00:00:04 false Hyphen fix: miR-93 voicetest-hyphen-mir93-fixed Sun, 11 Oct 2026 21:10:57 +0000 00:00:04 false Hyphen fix: SARS-CoV-2 voicetest-hyphen-sarscov2-fixed Sun, 11 Oct 2026 21:10:56 +0000 00:00:06 false Hyphen check: Ki-67 voicetest-hyphen-ki67 Sun, 11 Oct 2026 21:03:54 +0000 00:00:04 false Hyphen check: Bcl-2 voicetest-hyphen-bcl2 Sun, 11 Oct 2026 21:03:53 +0000 00:00:04 false Hyphen check: 5-HTergic voicetest-hyphen-5htergic Sun, 11 Oct 2026 21:03:52 +0000 00:00:04 false Hyphen check: microRNA-93 voicetest-hyphen-microrna93 Sun, 11 Oct 2026 21:03:51 +0000 00:00:05 false Hyphen check: miR-93 voicetest-hyphen-mir93 Sun, 11 Oct 2026 21:03:50 +0000 00:00:04 false Hyphen check: SARS-CoV-2 voicetest-hyphen-sarscov2 Sun, 11 Oct 2026 21:03:49 +0000 00:00:05 false CoQ10 pronunciation test (Google TTS, Neural2-J) voicetest-coq10-google Sun, 11 Oct 2026 20:59:23 +0000 "coh-cue-tin" respelling on the live Google TTS pipeline.]]> 00:00:07 false Google Cloud TTS (Neural2-J), EPA/DHA excerpt voicetest-google-neural2j-epadha Sun, 11 Oct 2026 20:18:47 +0000 00:00:34 false Google Cloud TTS (Neural2-I), EPA/DHA excerpt voicetest-google-neural2i-epadha Sun, 11 Oct 2026 20:18:45 +0000 00:00:34 false Google Cloud TTS (Neural2-A), EPA/DHA excerpt voicetest-google-neural2a-epadha Sun, 11 Oct 2026 20:18:43 +0000 00:00:37 false Google Cloud TTS (Neural2-D), EPA/DHA excerpt voicetest-google-neural2d-epadha Sun, 11 Oct 2026 20:16:49 +0000 00:00:36 false Piper norman, EPA/DHA excerpt (length 0.9, default noise) voicetest-norman-epadha-nonoise Sun, 11 Oct 2026 18:02:04 +0000 00:00:34 false Piper bryce, EPA/DHA excerpt (length 0.9, current noise settings) voicetest-bryce-epadha Sun, 11 Oct 2026 17:59:40 +0000 00:00:41 false Piper norman, EPA/DHA excerpt (length 0.9, current noise settings) voicetest-norman-epadha Sun, 11 Oct 2026 17:59:39 +0000 00:00:39 false Piper joe, EPA/DHA excerpt, noise_scale 1.3 + noise_w 2.2 (likely too far) voicetest-joe-epadha-push3 Sat, 10 Oct 2026 20:45:16 +0000 00:01:19 false Piper joe, EPA/DHA excerpt, noise_scale 1.15 + noise_w 1.8 voicetest-joe-epadha-push2 Sat, 10 Oct 2026 20:45:15 +0000 00:00:47 false Piper joe, EPA/DHA excerpt, noise_scale 1.0 + noise_w 1.5 voicetest-joe-epadha-push1 Sat, 10 Oct 2026 20:45:14 +0000 00:00:36 false Piper joe, EPA/DHA excerpt, noise_scale 0.85 + noise_w 1.2 voicetest-joe-epadha-both-up Sat, 10 Oct 2026 20:41:48 +0000 00:00:34 false Piper joe, EPA/DHA excerpt, noise_w 1.2 voicetest-joe-epadha-noisew-up Sat, 10 Oct 2026 20:41:47 +0000 00:00:34 false Piper joe, EPA/DHA excerpt, noise_scale 0.85 voicetest-joe-epadha-noise-up Sat, 10 Oct 2026 20:41:46 +0000 00:00:33 false Piper joe, EPA/DHA excerpt (current production settings) voicetest-joe-epadha-baseline Sat, 10 Oct 2026 20:41:45 +0000 00:00:33 false Piper joe, noise_scale 0.85 + noise_w 1.2 (both up) voicetest-joe-both-up Sat, 10 Oct 2026 20:35:36 +0000 00:00:23 false Piper joe, noise_w 1.2 (more rhythm variation) voicetest-joe-noisew-up Sat, 10 Oct 2026 20:35:35 +0000 00:00:22 false Piper joe, noise_scale 0.85 (more expressive) voicetest-joe-noise-up Sat, 10 Oct 2026 20:35:34 +0000 00:00:22 false Piper ryan-high (same length scale 0.9, default noise) voicetest-ryanhigh-same-settings Sat, 10 Oct 2026 20:35:33 +0000 00:00:20 false Piper joe (current production settings) voicetest-joe-baseline Sat, 10 Oct 2026 20:35:32 +0000 00:00:22 false XTTS male voice: Baldur Sanjin (chunked, parens low-passed, acronyms spelled) voicetest-xtts-male-baldur-sanjin-v2 Sat, 10 Oct 2026 20:27:59 +0000 00:00:42 false Piper (current setup: joe, length scale 0.9) voicetest-piper-joe-sametext Sat, 10 Oct 2026 19:45:46 +0000 00:00:22 false XTTS-v2 (Coqui, CPU, speaker: Damien Black) voicetest-xtts-damien Sat, 10 Oct 2026 19:45:45 +0000 00:00:26 false Joe 0.9 + Amy quote section 0.8 (parentheses low-passed) voicetest-quote-joe0.9-amy0.8 Mon, 28 Sep 2026 15:58:20 +0000 00:00:40 false Joe 0.9 + Amy quote section 0.9 (parentheses low-passed) voicetest-quote-joe0.9-amy0.9 Mon, 28 Sep 2026 15:58:19 +0000 00:00:41 false Joe 1x: whole clip length scale 0.909, parentheses LOW-PASS 2.5 kHz voicetest-paren-joe1x-ls0.909-lowpass-2500 Mon, 28 Sep 2026 15:48:30 +0000 00:00:23 false Parentheses: FASTER (length scale 0.8) voicetest-paren-faster-0.8 Mon, 28 Sep 2026 15:32:10 +0000 00:00:20 false Parentheses: SLOWER (length scale 1.3) voicetest-paren-slower-1.3 Mon, 28 Sep 2026 15:32:09 +0000 00:00:23 false Parentheses: HIGH-PASS filter (900 Hz, thinner) voicetest-paren-highpass-900 Mon, 28 Sep 2026 15:32:08 +0000 00:00:22 false Parentheses: HIGH-PASS filter (500 Hz, thin) voicetest-paren-highpass-500 Mon, 28 Sep 2026 15:32:07 +0000 00:00:21 false Parentheses: LOW-PASS filter (1.8 kHz, more muffled) voicetest-paren-lowpass-1800 Mon, 28 Sep 2026 15:32:06 +0000 00:00:21 false Parentheses: LOW-PASS filter (2.5 kHz, muffled) voicetest-paren-lowpass-2500 Mon, 28 Sep 2026 15:32:05 +0000 00:00:21 false Parentheses: pitch DOWN -1.5 semitones (subtle) voicetest-paren-pitch-down-1.5st Mon, 28 Sep 2026 15:24:12 +0000 00:00:22 false Parentheses: pitch UP +1.5 semitones (subtle) voicetest-paren-pitch-up-1.5st Mon, 28 Sep 2026 15:24:11 +0000 00:00:22 false Parentheses: pitch DOWN -3 semitones voicetest-paren-pitch-down-3st Mon, 28 Sep 2026 15:24:10 +0000 00:00:21 false Parentheses: pitch UP +3 semitones voicetest-paren-pitch-up-3st Mon, 28 Sep 2026 15:24:09 +0000 00:00:22 false Parentheses: current (pause only) voicetest-paren-current-pause-only Mon, 28 Sep 2026 15:24:08 +0000 00:00:21 false lessac (en_US-lessac-medium) voicetest-lessac Thu, 17 Sep 2026 16:24:20 +0000 00:01:03 false ryan (en_US-ryan-high) voicetest-ryan Thu, 17 Sep 2026 16:23:20 +0000 00:01:01 false amy (en_US-amy-medium) voicetest-amy Thu, 17 Sep 2026 16:22:20 +0000 00:01:08 false alan (en_GB-alan-medium) voicetest-alan Thu, 17 Sep 2026 16:21:20 +0000 00:01:12 false joe (en_US-joe-medium) voicetest-joe Thu, 17 Sep 2026 16:20:20 +0000 00:01:02 false joe, pitch +8% voicetest-joe-pitch1.08 Thu, 17 Sep 2026 16:35:16 +0000 00:01:02 false joe, pitch +15% voicetest-joe-pitch1.15 Thu, 17 Sep 2026 16:34:16 +0000 00:01:02 false joe, pitch +22% voicetest-joe-pitch1.22 Thu, 17 Sep 2026 16:33:16 +0000 00:01:02 false saladino: 🤔 The problem with PEANUT BUTTER (joe, pitch +8%) voicetest-saladino-joe-pitch1.08 Thu, 17 Sep 2026 16:44:24 +0000 00:03:39 false saladino: 🤔 The problem with PEANUT BUTTER (alan) voicetest-saladino-alan Thu, 17 Sep 2026 16:49:02 +0000 00:04:20 false saladino: peanut butter (joe +8% pitch, +10% speed) voicetest-saladino-joe-pitch1.08-tempo1.1 Thu, 17 Sep 2026 16:58:20 +0000 00:03:19 false saladino: peanut butter (joe +8% pitch, +20% speed) voicetest-saladino-joe-pitch1.08-tempo1.2 Thu, 17 Sep 2026 16:57:20 +0000 00:03:03 false saladino: peanut butter (joe +8% pitch, +30% speed) voicetest-saladino-joe-pitch1.08-tempo1.3 Thu, 17 Sep 2026 16:56:20 +0000 00:02:49 false saladino: 🤔 The problem with PEANUT BUTTER (joe, original pitch, 1.2x speed) voicetest-saladino-joe-speed1.2 Thu, 17 Sep 2026 17:08:27 +0000 00:03:03 false haidut: Serotonin (5-HT) may be a major cause of heart valve disease (saladino voice: joe, 1.2x speed) voicetest-haidut-saladino-voice Fri, 18 Sep 2026 12:38:41 +0000 00:02:26 false haidut: Serotonin (5-HT) may be a major cause of heart valve disease (joe, 1.1x speed) voicetest-haidut-joe-1.1x Fri, 18 Sep 2026 12:50:58 +0000 00:02:44 false