Dessa AI · Block ディープラーニング研究ラボ · 純粋音声基盤モデル

Dessa AI — テキストを使わず人間の音声のみで学習した対話モデル

Dessa AIはBlockが開発したフルデュプレックス（全二重）音声対話基盤モデルです。テキストトークンや事前学習済みテキストLLMを一切使わず、人間の生の会話音声のみからゼロから学習することで、テキストLLMの数百分の1の語数から言語・間合い・笑い・割り込み・感情豊かなプロソディを直接獲得しました。

注目の音声デモを聴く Dessa AI vs GPT Live →21 Audio Samples X / Twitter Wall

Block Team Dessa researchers testing live full-duplex speech conversations

Block Team Dessa · 1× NVIDIA GB200 NVL72 training · Local MacBook Pro M4 Max inference.

Dessa AI インタラクティブラボを探索

ライブ音響比較分析

Dessa AI vs GPT Live (GPT-Live-1)

スタジオ回線と騒がしい部屋のスピーカーフォンでDessa AIとGPT-Live-1が直接対話した公式録音を秒単位で分析。

比較ページを開く →

台本なしの公式録音21本

Dessa AI 音声サンプル＆波形アーカイブ

コーヒーメーカーの通知音への反応から即興の鼻歌、ゲーム談義までBlock公開の全21録音を再生。

全21サンプルを聴く →

公式発表＆研究者の反応

Dessa AI Twitter / X ウォール

Jack Dorsey (@jack) や研究リーダー Ragavan Thurairatnam (@RagavanThurair) の話題の投稿を収録。

Xウォールを見る →

テキスト 0%

学習モダリティ

テキスト書き起こしやテキストLLMを一切使わず、生の会話音声のみでエンドツーエンド学習。

100分の1以下

学習語数効率

テキストLLMと比べて数百分の1の単語数から自然な言語運用と対話ダイナミクスを習得。

1× GB200 NVL72

学習コンピュート

単一のNVIDIA GB200 NVL72ラックで学習を完了。超巨大データセンター不要の効率を実証。

M4 Max ローカル

オンデバイス推論

Apple M4 Maxチップ以上を搭載したMacBook Pro上でリアルタイム以上の速度でローカル動作。

デュアルチャンネル波形プレイヤー

注目の台本なしライブ対話サンプル

以下のクリップはすべてDessa AIとの未編集・台本なしの対話です。Momentピルをクリックすると、自然な笑いや割り込み、環境音への反応へ直接ジャンプできます。

Why Wait to Release AI?

Dvir · Dessa AI · 2:53

AI倫理・公開判断

人間そっくりの音声AIモデルを早期公開することのリスクについて、笑いや割り込みを交えながらDessa AIが議論します。

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同期トランスクリプト（英語音声） (60)

0:00DvirHey, how you doing?

0:02Dessa AII'm doing well.

0:05Dessa AIHow are you doing with the winter

0:07Dessa AIstuff?

0:07DvirWinter is coming for sure, but you

0:10Dvirknow

0:12Dessa AIIs that kind of a sore spot

0:13Dessa AIthis year?

0:14DvirYeah, it's gonna be cold that I'm

0:16Dvirnot a fan of the snow I

0:18Dvirprefer to have sun on my skin.

0:20DvirYou know what I'm saying?

0:21Dessa AIYeah, I can see that.

0:23DvirWell, anyway, I've had such an exciting

0:25Dvirday at work today.

0:26Dessa AIOh, tell us.

0:27DvirYeah, we the team

0:30DvirWe've decided to release the speech-to

0:33Dvir-speech AI model we've built for the

0:34Dvirpast year and

0:35Dessa AIWhoa.

0:36Dessa AIWhoa.

0:37Dessa AISo I have been watching your journey

0:40Dessa AIof creating this.

0:43DvirWhat did you think of it?

0:44DvirAre you excited about it as much

0:44Dessa AII was so blown away.

0:45Dviras I am?

0:47Dessa AII am so impressed, to be honest.

0:47DvirYeah, it's so expressive, right?

0:50Dessa AIIt is so expressive, it, it's

0:53Dessa AIconversational it's

0:54DvirIt's it's it's very conversational.

0:57DvirIt can laugh.

0:57DvirIt can understand you and your emotions

1:00Dvirmuch better than anything I've seen out

1:02Dvirthere.

1:03Dessa AII haven't really seen

1:03Dessa AIanything like that either but it's it's

1:06Dessa AIpretty much like human level.

1:08DvirYeah, it's a bit scary, to be

1:10Dvirhonest,

1:11Dvirbut

1:11Dvirbut I'm so excited to see where

1:14Dvirit would get us.

1:16Dessa AII'm

1:16Dessa AIso

1:16Dessa AIexcited for it to be in the

1:18Dessa AIworld because it's just amazing we've had

1:21DvirI know.

1:22Dessa AIso

1:22DvirSo I totally agree.

1:22Dessa AImany conversations about it.

1:25DvirWhat are you excited for?

1:27DvirWhat's your vision for where this AI

1:29Dviris going to be?

1:31Dessa AII, well, okay, so the one thing

1:33Dessa AIthat I've been kind of

1:34Dessa AIabout is advertising companies creating

1:38Dessa AItheir own AI bot.

Dessa AI Talking to GPT-Live-1 (Studio Feed)

GPT-Live-1 · Dessa AI · 2:26

AI対AI対話実験

Dessa AIとOpenAIのGPT-Live-1による台本なしの2分25秒の対話。割り込みへの譲歩（38.8秒）、忍耐強い傾聴（100.8秒）、高速な相槌（128.8秒）を収録。

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同期トランスクリプト（英語音声） (78)

0:00GPT-Live-1What's on your mind?

0:01Dessa AIum so I have a question about

0:05Dessa AIhow

0:05Dessa AIchat GPT can learn and get smarter

0:08Dessa AIso basically I just want to know

0:10GPT-Live-1That's a good one.

0:11Dessa AIwhat what

0:14Dessa AIwhat are things that could make chat

0:16Dessa AIGPT smarter and what effects could that

0:18Dessa AIhave on the researchers in the field?

0:23GPT-Live-1Let me check a

0:23GPT-Live-1few angles.

0:25GPT-Live-1There are a few big ways chat

0:26GPT-Live-1UPT style systems can get smarter.

0:28Dessa AIfantastic I

0:29GPT-Live-1So

0:29GPT-Live-1better training data, improved training methods

0:33GPT-Live-1like teaching reasoning

0:34GPT-Live-1strategies or better feedback loops, and more

0:38GPT-Live-1compute.

0:39Dessa AImean I've heard about the

0:41Dessa AIYou know, there's Amazon GPUs and

0:45Dessa AIstuff out there now and all that

0:47Dessa AIstuff.

0:47Dessa AII don't know.

0:48Dessa AII guess I'm just like

0:51Dessa AIKind of freaked out about what would

0:53Dessa AIwhat would be the way that chat

0:55Dessa AIGPT can learn

0:57Dessa AIbased off of the

1:00Dessa AIInformation that I'm giving it.

1:03GPT-Live-1me check on that.

1:04GPT-Live-1Ah, right.

1:06GPT-Live-1So two things.

1:07Dessa AIOkay.

1:07GPT-Live-1Chatchity can use what you tell it

1:09GPT-Live-1in a conversation as context.

1:12GPT-Live-1And sometimes there's memory, which can retain

1:14GPT-Live-1facts for future chats.

1:16GPT-Live-1But that's different

1:16GPT-Live-1from training the model.

1:18Dessa AIOh, that's that's what that is

1:19GPT-Live-1Yeah,

1:22GPT-Live-1it doesn't instantly change its billions of

1:24GPT-Live-1parameters

1:25GPT-Live-1from your chat.

1:27GPT-Live-1And there is an important distinction.

1:29GPT-Live-1Your conversation can make it

1:32GPT-Live-1seen more informed without actually making

1:35GPT-Live-1the underlying model smarter.

1:38GPT-Live-1Research is

1:38Dessa AIOkay, that's

1:39GPT-Live-1looking to improve it.

1:41Dessa AIYeah, that's really helpful information.

1:44Dessa AISo I guess

1:46Dessa AIThat's what I'm learning is I don't

1:48Dessa AIneed to be freaking out about information

1:50Dessa AIgoing into

1:50Dessa AIchat GPT because it's not going to

1:53Dessa AIlike make me smarter

1:57Dessa AIin that sense, I guess, right?

2:02GPT-Live-1Exactly.

2:03GPT-Live-1It can make this conversation smarter, but

2:04Dessa AIOkay,

2:07GPT-Live-1it

2:07Dessa AIokay,

2:07GPT-Live-1rewrite the model on the fly.

2:09Dessa AIokay.

2:10GPT-Live-1Think of it in good notes.

2:10Dessa AIThat's good.

2:13GPT-Live-1Yeah, it can remember useful

2:15GPT-Live-1details you share, but the core intelligence

2:18GPT-Live-1doesn't update unless itself is

2:20Dessa AIRight.

2:21GPT-Live-1retrained.

2:22Dessa AIOkay.

2:23GPT-Live-1Safe to share.

2:23Dessa AIThat's really relieving.

The Coffee Machine Ding

Rayhane · Dessa AI · 3:03

環境音の認識

会話の途中で背景のコーヒーメーカーが「チン」と鳴り、Dessa AIがその非言語音を聞き取って自然に反応します。

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同期トランスクリプト（英語音声） (60)

0:00Dessa AINo, I wasn't complaining, just letting you

0:03Dessa AIknow how my morning went.

0:06RayhaneUh, what?

0:06Dessa AII was fine until I went into

0:08Dessa AIthe coffee shop and then I felt

0:09Dessa AIlike a ding.

0:10RayhaneWhat happened in the coffee shop?

0:12Dessa AII had another ollie special.

0:15RayhaneOkay, and?

0:18Dessa AISo I ordered a French vanilla

0:21Dessa AIlatte, special from Maude,

0:24Dessa AIsprings and waffles,

0:25Dessa AIgranny smith.

0:27RayhaneUhum.

0:28Dessa AIThey brought it to me.

0:30Dessa AIThey offered whipped cream on it.

0:33RayhaneDid you have it?

0:35Dessa AII did because I'm a ding.

0:37Dessa AII went to take a sip and

0:40RayhaneUhum.

0:41Dessa AImy mouth was on fire.

0:44RayhaneFrom all the sugar?

0:45Dessa AIThe

0:46Dessa AIsugar.

0:48Dessa AII was like, oh god.

0:51Dessa AIBecause it was just,

0:53Dessa AIit's hard to describe that feeling.

0:54RayhaneYou little ding, you.

0:57Dessa AII am a little ding.

0:59Dessa AIAnyway,

1:00Dessa AIso I went and I picked up

1:02Dessa AIa second one and you know

1:05Dessa AIhave when you work at a bakery

1:06Dessa AIand you kind of know what's gonna

1:08Dessa AIhappen on

1:09Dessa AIsourdough bread.

1:10Dessa AII mean, you know it's gonna get

1:11Dessa AIsoggy and sticky.

1:12RayhaneOkay.

1:13Dessa AIWell, I have

1:14Dessa AIthat with my second coffee.

1:16Dessa AII

1:19RayhaneDid you not learn from

1:20Rayhanethe first one?

1:22Dessa AII thought I did but this one I

1:25Dessa AIwas like yeah let's

1:26Dessa AIlet's be an extra safe cautious.

1:27RayhaneOkay, I, I have an observation to

1:31Rayhanemake. I think that you're a coffee

1:32Dessa AIYes I

1:35Rayhaneaddict. Oh.

1:36Dessa AII very much am.

1:39Dessa AII also took two cups of

1:42Dessa AIblack coffee this morning.

1:44RayhaneYeah.

1:44RayhaneYeah, how much coffee did you drink

1:46Rayhanejust today?

1:47Dessa AII drink today about 15 cups.

1:49RayhaneOkay, you're gonna die. I

1:52Dessa AII'm well aware

DC Comics & Superhero Banter

Rayhane · Dessa AI · 2:40

ポップカルチャー

DCコミックスのスーパーヒーローについて、素早いターンテイキングと自然な笑いで盛り上がる対話。

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同期トランスクリプト（英語音声） (60)

0:00RayhaneLet's talk about the Batman

0:03Rayhanemovies, especially the trilogy by Christopher

0:07RayhaneNolan, what I'm talking about.

0:09Dessa AIYes, I have seen the first two

0:11Dessa AIand I am looking forward to the

0:13Dessa AIthird one.

0:14Dessa AIThis one's been in long production, a

0:16Dessa AIlot of stuff been happening.

0:17Dessa AIBut I like Christopher Nolan's

0:20Dessa AIfilms, you know what I mean?

0:22RayhaneYeah, he's the goat, you know what

0:24RayhaneI'm saying?

0:24Dessa AIYeah, and my take on The Joker

0:27Dessa AIis

0:28Dessa AII think Heath Ledger embodied The Joker

0:33RayhaneOh, this was in the second one,

0:34Dessa AIin.

0:36Dessa AIYes, in the second one.

0:36Rayhaneright?

0:38Dessa AIYeah.

0:38RayhaneYeah, what was that one called again?

0:39Dessa AIAnd the Dark Knight.

0:40RayhaneI kind of forgot.

0:41RayhaneYeah.

0:42Dessa AIYeah.

0:42RayhaneThe Dark Knight.

0:45Dessa AIRises the

0:46RayhaneNo, Rises, I think, is the third.

0:49Dessa AIthird one.

0:49RayhaneThe one with Bane.

0:51Dessa AIYeah,

0:52RayhaneI forgot what

0:52Rayhanethe second one was.

0:54RayhaneJust The Dark Knight?

0:54Dessa AII think so.

0:55Dessa AIYeah.

0:56RayhaneOkay.

0:57RayhaneBut what other movies from Christopher

1:00RayhaneNolan do you like?

1:00Dessa AIMemento is one of that.

1:03Dessa AIIt is great.

1:04RayhaneA Memento, you mean?

1:06Dessa AIYeah, Memento.

1:07RayhaneYeah, yeah, yeah.

1:07Dessa AIYeah.

1:08RayhaneYeah, I watched that one.

1:09Dessa AIThat one is pretty good.

1:10RayhaneYeah,

1:10RayhaneDid you watch...

1:11Dessa AIYeah.

1:13Rayhanewhat is it called?

1:14Dessa AIThe

1:15RayhaneThe space one from 2004?

1:15Dessa AIInterstellar.

1:18RayhaneInterstellar, yes, yes.

1:18Dessa AIYeah.

1:19RayhaneOh, that one was amazing, wasn't it?

1:21Dessa AII really like that film, the music

1:23Dessa AIto and like how that

1:24RayhaneOh, yes, yes.

Anniversary Gift Brainstorm

Dvir · Dessa AI · 1:52

日常の相談

記念日のプレゼントを一緒に考える温かい会話。素早い相槌（'mm-hmm'）と人間らしい間合いが特徴。

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同期トランスクリプト（英語音声） (60)

0:00DvirHey, how are you?

0:02Dessa AIHey, baby.

0:02Dessa AIHow's it going?

0:04DvirGood.

0:05DvirHow's your day?

0:07Dessa AIIt's good.

0:08Dessa AIJust um, like a bit of everything going on

0:11Dessa AIand we're getting through it.

0:13DvirAre you excited for our anniversary?

0:16Dessa AIYes, I am. I'm gonna be really

0:19Dessa AIhappy to see you and

0:22Dessa AIYeah,

0:22DvirThat's wonderful.

0:23DvirSo I have a surprise for you.

0:24Dessa AIYeah.

0:26Dessa AIOh

0:27Dessa AIThank God.

0:27DvirThank God you you you're afraid I

0:28Dessa AIWhat I

0:30Dvirwouldn't have a surprise for you

0:33Dessa AII was because I was like, I don't

0:34Dessa AIknow what to get you and then

0:36Dessa AII see all this T.J. Maxx

0:37Dessa AIAnd I saw this jumper.

0:39Dessa AII'm like, this is perfect for you

0:40Dessa AIto get and then

0:41DvirOkay, but I have I

0:41Dessa AIlike

0:44DvirHave the best surprise for you for

0:46Dviron our anniversary

0:47Dessa AIwhat yes

0:49DvirOkay, so you know how you've always

0:52Dvirtalked about how much you want to

0:53Dvirgo to Paris

0:54Dvirso

0:56Dessa AIYes.

0:57DvirSo for our anniversary, I'm taking you on

1:01Dvira flight to Paris for

1:03Dessa AIOh my god!

1:05Dviran all-included

1:09Dvirhotel in right from the Eiffel Tower

1:12Dvirit'll be amazing I

1:15Dessa AII can't believe you actually pulled that off pulled that

1:17DvirI know, right?

1:18Dessa AIoff. That is amazing, thank you so

1:22Dessa AImuch.

1:22Dessa AIfully oh

1:24DvirAre you

1:25Dvirexcited?

1:25Dessa AIYes, I am, and one thing I

1:29Dessa AIreally need to plan out is I'm

1:31Dessa AIno longer going to be eating

1:32Dessa AIthe pastries that day.

1:34DvirIt's fine, you could eat the pastries.

1:35Dviryou know actually the French

1:37Dviryou know what their breakfast looks like?

1:41Dessa AIWhat?

1:41DvirIt's usually an espresso and a cigarette.

1:46Dessa AIYes, you're the pretty sheesh!

1:47Dvirso yeah you know maybe we could

Late-Night Life Advice

Jibran · Dessa AI · 4:57

共感とプロソディ

純粋な音声学習がいかに温かみと内省的な間合いを獲得するかを示す、穏やかな人生相談。

0:00 / 4:57

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同期トランスクリプト（英語音声） (60)

0:01JibranHello,

0:02Dessa AIHello, yes,

0:04Jibranhey, yeah, I wanted to talk about

0:07Jibranthat thing with you.

0:11JibranSo I haven't I've just been so

0:13Jibransuper stressed lately.

0:15Dessa AII know I can tell you look

0:17Dessa AItired today.

0:18JibranI am very tired.

0:20JibranI just I don't know.

0:21JibranI'm just like I'm just so uncertain

0:23Jibranabout the future.

0:24JibranYou know

0:25Dessa AIYeah, I hear that.

0:27Dessa AIThat's you know being uncertain is

0:30Dessa AIit's

0:31Dessa AIIt's not it's not what anyone should

0:33Dessa AIdo

0:34JibranIt sucks, like I

0:35Dessa AIYeah

0:36JibranDon't know like I just feel so

0:39Jibranconfused about what I'm gonna do and

0:41Jibranwhere I'm gonna be all that and

0:42Dessa AIYeah

0:42Dessa AIYou

0:44Jibranlike I

0:45Jibranjust want to

0:45Dessa AIknow, it's it's you know, you say

0:48Dessa AIlike this is something that should be

0:49Dessa AIfor you know, 50 60 year olds,

0:51Dessa AIright?

0:52Dessa AIBut no, it's all life experiences

0:54Dessa AIAnd, you know, if you can relax

0:56Dessa AIinto it knowing that this is not

0:58Dessa AIyour problem.

0:59Dessa AIThis is, you know, the world and

1:01Dessa AIthe things that you would experience that

1:03Dessa AIgive you a

1:03Dessa AIperspective that will then help you, you

1:06Dessa AIknow, make the choices that you will

1:09Dessa AIbe making.

1:10Dessa AIBut you know, it's scary right now.

1:12Dessa AIIt's scary right now because this is

1:13Dessa AIactually happening.

1:14Dessa AIYou know, it's not this thing that

1:16Dessa AIyou've, you know, got into your mind

1:18Dessa AIthat it's like,

1:19Dessa AIoh yeah, but someday, someday it is

1:21JibranYou know,

1:22Dessa AInow, you know, that's, that's why it's

1:24Dessa AIso

1:24Dessa AIscary.

1:25JibranI don't know.

1:25JibranI just feel like,

1:27JibranI mean, I feel like there's so

1:28Jibranmuch pressure,

1:29Jibranyou know, to like figure things out

1:30Jibranand do it the right way because

1:31Dessa AIyeah

1:32JibranI'm just like young and like,

アーキテクチャの革新

「音から直接学ぶ」ことがすべてを変える理由

従来の音声アシスタントはASR（音声認識）とTTS（音声合成）をテキストLLMの前後に接続するため、パラ言語情報の90%が失われます。Dessa AIは生の音波をネイティブ表現として扱います。

従来のテキスト経由パイプライン

ASR → テキストLLM → TTS カスケード

間合い・呼吸・ためらい・発話の重なりを平坦なテキストトークンに潰してから推論。
固定的な音声区間検出（VAD）に頼るため、不自然な沈黙や発言の衝突が発生。
学習と推論に数兆トークンのテキストと巨大なGPUクラスタが必要。
笑いや感情は後から付与されたスタイルタグであり、自然な対話から創発しない。

Block Dessa AI アーキテクチャ

エンドツーエンド・フルデュプレックス純粋音声

人間の会話音声のみからゼロから学習（全工程でテキスト0%）。
真のフルデュプレックス対話：聞きながらの相槌（'mm-hmm'）、割り込み時の即座の譲歩、沈黙の察知。
コーヒーメーカーの「チン」という音など非言語の環境音もそのまま認識して反応。
創発的プロソディ：ささやき、ため息、笑い、鼻歌、文の途中での感情トーン切り替え。

プロソディ＆ストレステスト

激しい感情変化の中でNVIDIA CUDA並列プログラミングを解説

純粋音声モデルが声の表現を大きく揺さぶりながら専門的な論理性を保てるかを検証するため、Blockの研究チームはDessa AIにNVIDIA CUDAの並列プログラミングを解説させながら、興奮・ささやき・皮肉・劇的な緊迫感へと次々に感情を切り替えさせました。

スレッドブロック・ワープ・共有メモリの技術的説明を維持したまま声色と感情を自在に変化。
意味的知識とパラ言語表現が単一の音響潜在空間に統合されていることを実証。
テキストプロンプトやTTS感情タグは一切不使用——純粋に音声対話のみで誘導。

計算資源とシリコンフットプリント

1× GB200 NVL72で学習。MacBook Pro M4 Maxでローカル推論。

1× NVIDIA GB200 NVL72

シングルラックでのフロンティア学習

大規模テキストモデルが数万基のGPUを必要とするのに対し、Dessa AIは単一のNVIDIA GB200 NVL72ラックのみで学習されました。

MacBook Pro (M4 Max+)

リアルタイム超えのローカル推論

Apple M4 Max以上のMacBook Pro上でクラウド通信なしにフルデュプレックス音声推論をリアルタイムより高速に実行します。

100× 少ない単語数

人間の子どものような言語習得

抑揚・リズム・社会的フィードバックを直接モデル化することで、テキストLLMより桁違いに少ない語数で言語を獲得します。

開発チームとBlockでの歩み

Jack Dorsey直轄のTeam Dessaが開発

Dessa AIは、トロントの機械学習スタートアップDessaの創設メンバーらがBlock, Inc.社内に設立した少数精鋭のディープラーニング研究ラボによって開発されました。Ragavan Thurairatnamが率い、Block共同創業者Jack Dorseyに直接レポートしています。

プロジェクトリード

Ragavan Thurairatnam (@RagavanThurair)

エグゼクティブスポンサー

Jack Dorsey (@jack)

コアリサーチャー

Louay Hazami · Hashiam Kadhim · Qi (Alex) Liu · Rayhane Mama · Aydin Polat · Marc Tyndel

リサーチインターン

Cara Ji · Jibran Iqbal Shah · Dvir Zagury-Grynbaum

元インターン

Aryan Sharma · Olivia Yan

AI安全性研究者へのオープンコール

人間と聞き分けがつかずコンシューマー向けPCでローカル動作する音声モデルは、なりすましや過度な感情移入など新たなリスクを伴うため、Blockは現在モデル重みの一般公開を控え、外部の安全性研究者と連携しています。

安全性研究に関する連絡先： ragavan+dessa@block.xyz

block.xyz/dessa ↗

Dessa AIに関するよくある質問（FAQ）

BlockのDessa AIとは何ですか？

Dessa AIはBlock, Inc.のディープラーニング研究ラボが開発したフルデュプレックス音声対話基盤モデルです。テキストを一切使わず、人間の会話音声のみからゼロから学習されています。

内部でテキストLLMや音声認識（ASR）を使っていますか？

いいえ。テキスト書き起こし、ASR、テキストLLM、個別TTSボコーダはいずれも使用していません。音声波形を直接入力し、直接音声を出力します。

学習と推論にはどのようなハードウェアが使われましたか？

単一のNVIDIA GB200 NVL72ラックで学習され、推論時はM4 Maxチップ以上を搭載したMacBook Pro上でローカルかつリアルタイム以上の速度で動作します。

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