The Human Voice Advantage | Harvey Castro, MD

Train the Voice Your Expertise Deserves

A 12-week voice-performance system for physicians, executives, founders, and anyone who has to be believed on the first pass. Find the one audible pattern costing you most, correct it, retest it, and carry it into the room.

One leak. One correction. One retest. Five to seven minutes a day, for eighty-four days.

Built for people whose voice carries professional consequences

Physicians, executives, founders, speakers, media guests, educators, and anyone whose voice has professional consequences. Here is what the course contains.

  • Twelve guided weeks, 158 lessons, and 84 daily Voice Gym sessions of five to seven minutes each.
  • A baseline voice test you record before Day 1, then repeat at Week 6 and Week 12 to hear what actually changed.
  • The DrGPT Voice Score, ten dimensions you learn to assess in your own recordings.
  • Twelve checkpoint quizzes and a weekly transfer task you run in a real professional setting.
  • Twelve Quick Protocols for keynote, media, podcast, board, bedside, teleprompter, Zoom, and bilingual moments.
  • Downloadable scorecard and printable protocols you can keep on your phone.
  • A course-completion certificate, lifetime access, and no subscription.

How a week works

  1. Before Day 1 you record a baseline, with no warm-up and no coaching. That recording is what you compare against later, not anyone else's voice.
  2. LEARN. Each week opens with one skill and one target. Airflow, fry control, phrase endings, home range, melody, registers, resonance, pace, warmth, keynote delivery, media and bilingual work, then pressure and fatigue.
  3. TRAIN. Seven daily Voice Gym sessions, five to seven minutes each. Activate, drill, apply, retest. One behavior at a time, and if a correction does not feel comfortable you go back to listening rather than stacking cues.
  4. PERFORM. A transfer task in a real professional setting, thirty to sixty seconds, using only that week's target. Then a checkpoint quiz before the next week opens.
  5. At Week 6 and Week 12 you record the same baseline passage again and compare. That comparison is the whole point of the twelve weeks.

What the twelve weeks train

Ten dimensions get trained and measured: pitch and home range, fry control, airflow and phrase support, melody, volume and projection, pace and pausing, tone and resonance, authority, warmth and connection, and performance readiness.

Weeks 1 to 3: the foundation

Airflow and neutral observation, fry control, and phrase endings that stop fading before the point lands.

Weeks 4 to 6: range and flexibility

Home range and pitch placement, melody, and register flexibility. Week 6 is your midpoint comparison.

Weeks 7 to 9: carry and connection

Resonance without simply dropping your pitch, then pace, pauses, articulation, projection, warmth, and emotional communication.

Weeks 10 to 12: the real rooms

Keynote and large-room performance, media and bedside and boardroom and bilingual delivery, then integration under pressure and fatigue.

Quick Protocols, all twelve weeks

Open from day one, not dripped. Sixty-second reset, green room, tired voice, keynote, media, podcast, board, bedside, teleprompter, hard question, Zoom, bilingual.

About the score. The DrGPT Voice Score is a coaching benchmark. It is not a validated diagnostic instrument and it is not a percentage of vocal health. Its job is to make change in your own voice visible over twelve weeks.

Choose where to start

Start with the free guide if you want the framework. Buy the course when you want the reps. Personal evaluations are separate and entirely optional.

The Field Guide

Free

The LEARN layer of the system in one book, at no cost. The framework, all twelve weekly targets, the Voice Score, the safety chapter, and all twelve Quick Protocols.

  • EPUB and PDF, both included, no card required
  • Daily Voice Gym sessions: not included
  • Best if you want the thinking before the training

Personal Voice Evaluation

From $99

Optional and separate from the course. Send a short speaking clip and receive a structured report naming your number one vocal leak, one correction, and one drill. Four tiers, depending on what is at stake.

  • AI-Assisted $99, or Harvey + AI $299
  • 12-Week Transformation $599, three reports across the course
  • Executive / Keynote Premium $995, up to five minutes

What this is, and what it is not

This is professional voice-performance education, built by an emergency physician who speaks for a living. It trains delivery: airflow, pitch, melody, resonance, pace, projection, warmth, and composure under pressure.

It is not medical care. It does not diagnose anything, it does not treat a voice disorder, and it is not speech-language pathology. If practice causes pain, strain, dizziness, unusual breathlessness, or a new or worsening voice symptom, the course tells you to stop rather than push through, and to see a clinician.

The DrGPT Voice Score is an unvalidated coaching benchmark intended primarily for within-person comparison. It is not medical diagnosis, voice therapy, or assessment of vocal-fold health.

Questions people ask first

How much time does this take each day?

Five to seven minutes. That is the whole daily commitment, and it is deliberate. A session you can finish between patients or before a call is a session you will actually do on day forty.

Do I need equipment or a quiet studio?

No. A recent phone in a reasonably quiet room is enough. You are comparing your voice to your own earlier recordings, so consistency matters far more than audio quality.

Is everything available right away?

Yes. All twelve weeks open at purchase, with no drip and no waiting. Work through it at the intended pace or move faster if you have a talk coming up. Access is lifetime, so you can come back to Week 10 before a keynote two years from now.

Will this make me sound like someone else?

No, and that is the point. The method is one leak, one correction, one retest. It removes what is getting in the way of your voice rather than installing a stage persona on top of it. If a correction does not feel comfortable, the course tells you to go back to listening instead of stacking cues.

My voice has been hoarse lately. Is this the right thing?

Probably not first. This is performance training, not assessment of a medical voice problem. If you have significant voice pain, new or worsening hoarseness, or a major unexplained change in your voice, get that looked at by a clinician before you worry about melody and pacing.

Do I need to buy a personal evaluation too?

No. Evaluations are a separate product and are not required to complete the course or to earn the certificate. The course teaches you to assess your own recordings, which is the skill you keep.

The Human Voice Advantage by Harvey Castro, MD. Questions before you buy? Contact me.

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