How to Use Speech to Text Converter

Vovsoft Speech to Text Converter requires credentials from at least one of these providers:

How to get OpenAI API Key

In order to get your OpenAI API key, please follow these steps:

1. Go to https://platform.openai.com/signup and create your OpenAI account for free.
2. Go to https://platform.openai.com/account/api-keys and create your API key.

How to get Deepgram API Key

In order to get your Deepgram API key, please follow these steps:

1. Go to https://console.deepgram.com/signup and create your Deepgram account for free.
2. Click API Keys.
3. Click Create a New API Key.

How to get Microsoft Azure API Key and API Region

In order to get your Microsoft Azure API key and API Region, please follow these steps:

1. Go to https://portal.azure.com and create your Microsoft Azure account for free.
2. Click Create a resource.
3. Choose Cognitive Services.
4. After you created your Speech Service, your credentials can be found in Keys and Endpoint page: KEY1, KEY2 (any one of the keys should work) and Location/Region fields.

Credentials screen of Microsoft Azure

Supported Languages in Microsoft Azure

Afrikaans, Albanian, Amharic, Arabic, Armenian, Azerbaijani, Bengali, Bosnian, Bulgarian, Burmese, Catalan, Chinese, Croatian, Czech, Danish, Dutch, English, Estonian, Filipino, Finnish, French, Georgian, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Irish, Italian, Japanese, Javanese, Kannada, Kazakh, Khmer, Korean, Lao, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Maltese, Marathi, Mongolian, Nepali, Norwegian Bokmål, Pashto, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Sinhala, Slovak, Slovenian, Somali, Spanish, Swahili, Swedish, Tamil, Telugu, Thai, Turkish, Ukrainian, Uzbek, Vietnamese, Welsh, and Zulu are supported in Microsoft Azure Cognitive Services.

How to get IBM Cloud API Key and API URL

In order to get your IBM Cloud API key and API URL, please follow these steps:

1. Go to https://cloud.ibm.com/registration and create your IBM Cloud account for free.
   Please Note: If you get this error message "Your account cannot be created at this time", use your Gmail email address. It seems like IBM Watson doesn't like some email providers. So, if you have any such problems, just use another email address.
    
2. Go to https://cloud.ibm.com/catalog/services/speech-to-text and create your Speech to Text Lite Plan instance.
    
3. Go to https://cloud.ibm.com/resources; under AI / Machine Learning tab, click on your Speech to Text instance. Your credentials (API key and URL) will be displayed in Manage or Service credentials page.

Credentials screen of IBM Cloud

Enter your API key and URL into the Settings panel inside "Vovsoft Speech to Text Converter". The software is now ready to convert audio to text.

Supported Languages and Models in IBM Cloud

English, Arabic, Chinese (Mandarin), Czech, Dutch, French, German, Hindi (Indian), Italian, Japanese, Korean, Portuguese (Brazilian) and Spanish are supported in IBM Cloud API.

For most languages, the IBM Cloud service supports broadband, narrowband, telephony and multimedia models:

• Broadband models are for audio that is sampled at greater than or equal to 16 kHz.
• Narrowband models are for audio that is sampled at 8 kHz. Use narrowband models for offline decoding of telephone speech, which is the typical use for this sampling rate.
• Telephony models are intended specifically for audio that is communicated over a telephone. Like previous-generation narrowband models, telephony models are intended for audio that has a minimum sampling rate of 8 kHz.
• Multimedia models are intended for audio that is extracted from sources with a higher sampling rate, such as video. Use a multimedia model for any audio other than telephonic audio. Like previous-generation broadband models, multimedia models are intended for audio that has a minimum sampling rate of 16 kHz.

Choosing the correct model is important. Use the model that matches the sampling rate (and language) of your audio. The service automatically adjusts the sampling rate of your audio to match the model that you specify. More information: https://cloud.ibm.com/apidocs/speech-to-text

Maximum File Size

• OpenAI Whisper's file size limit is 26,214,400 bytes (25MB).

Approximate Conversion Time

Conversion times are listed in the table below. Please note that the specified times vary depending on the content of the file, its quality, language model, load of the AI servers and your computer's upload speed.

Common Errors

HTTP/1.1 503 Service Unavailable
Your URL is wrong. Please enter the exact "API Key" and "API URL" that was supplied for you by IBM Cloud.

Error sending data: (12030) The connection with the server was terminated abnormally
A firewall, proxy or antivirus interferes with the connection. Please try to disable them or use different internet connection.

Error reading data: (12152) The server returned an invalid or unrecognized response
Your audio is too long. Please try to convert a shorter audio.

"Please wait" hangs, nothing happens
The file size of your audio is too large. Please try to upload a smaller file. Converting stereo to mono may help.