Amazon Polly

[bmodeco]

Hi,
I did some testing with voicerss for text-to-speech but i find that the quality insufficient.
I would like to use amazon aws Polly but I don't know how to authenticate when using the http-api.
The idea would be to also to get an mp3 back just like with voiceless.
Anyone who can help me with this?
Thanks, Bart

[gjniewenhuijse]

Hi,
I did some testing with voicerss for text-to-speech but i find that the quality insufficient.
I would like to use amazon aws Polly but I don't know how to authenticate when using the http-api.
The idea would be to also to get an mp3 back just like with voiceless.
Anyone who can help me with this?
Thanks, Bart

hello, did you have the voicerss service working? can you please share your code?

[bmodeco]

Hi,
I did some testing with voicerss for text-to-speech but i find that the quality insufficient.
I would like to use amazon aws Polly but I don't know how to authenticate when using the http-api.
The idea would be to also to get an mp3 back just like with voiceless.
Anyone who can help me with this?
Thanks, Bart

hello, did you have the voicerss service working? can you please share your code?

Hi,
Will post it tonight. The mp3 is saved (through ftp) om my synology-nas so that all my sonos-speakers have access to the mp3.
I have it currently setup so that my music (when playing) pauses, plays the mp3 and then continues were it left of.
don't know if this is what you are looking for.
I am using this for my doorbell also: pushbutton connected to knx-input, triggers a script that pauses music (when playing), plays the doorbell sound (or a barking dog if you want ) and continues afterwards.
I wanted to convert this to amazon polly but I don't know how to do the authentication (creation of signature/hash-stuff) when using the http-api.
Amazon Polly has lots of options: parts of text louder or even whispering, parts of text faster or slower...

Check this link for hearing the voices: https://aws.amazon.com/polly/details/
They sound very lifelike...(even dutch female/male voice)
Br,
Bart

[bmodeco]

Hi Admin,
Any ideas on how to do the authentication for the http api of aws amazon polly?
Should be similar to what you are doing with amazon alexa...
Thanks, Bart

[admin]

I can try and provide a sample but I don't have anything to test it with. If you can setup Polly on your AWS account and PM the details then I can see what I can do

[bmodeco]

I can try and provide a sample but I don't have anything to test it with. If you can setup Polly on your AWS account and PM the details then I can see what I can do

Hi admin,
I did send you a PM with the info to access my aws Polly.
Thanks again,
BR, Bart

[admin]

Here's an example on how to access Amazon Polly. Make sure you set region, accesskey, secretkey and voice variables correctly.

This has been tested on the latest RC1 firmware, but you also need to install package updates to have support for sha256 function:
Standard LM: https://dl.openrb.com/misc/luaencdec_20170426_mxs.ipk
LM power version: https://dl.openrb.com/misc/luaencdec_20170426_imx6.ipk

Code:

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function getpollyurl(text)   -- CONFIG VARIABLES   local region = 'eu-west-1' -- your AWS region   local accesskey = 'xxx'   local secretkey = 'yyy'   local voice = 'Joey' -- list of voices: https://aws.amazon.com/polly/details/   -- same as JS encodeURIComponent   local function encode(str)     return (str:gsub("[^%w%-_%.%!%~%*%'%(%)]", function(c)       return string.format("%%%02X", c:byte(1,1))     end))   end   function toquerystring(items)     local res = {}     for _, item in ipairs(items) do       res[ #res + 1 ] = item[ 1 ] .. '=' .. encode(item[ 2 ])     end     return table.concat(res, '&')   end   function getkey(key, datestamp, regionname, servicename)     local kdate = encdec.hmacsha256(datestamp, 'AWS4' .. key, true)     local kregion = encdec.hmacsha256(regionname, kdate, true)     local kservice = encdec.hmacsha256(servicename, kregion, true)     return encdec.hmacsha256('aws4_request', kservice, true)   end   local encdec = require('encdec')   local method = 'GET'   local service = 'polly'   local host = service .. '.' .. region .. '.amazonaws.com'   local api = '/v1/speech'   local endpoint = 'https://' .. host .. api   local amzdate = os.date('!%Y%m%dT%H%M%SZ')   local datestamp = os.date('!%Y%m%d')   local algorithm = 'AWS4-HMAC-SHA256'   local canonicaluri = api   local canonicalheaders = 'host:' .. host   local signedheaders = 'host'   local credentialscope = datestamp .. '/' .. region .. '/' .. service .. '/' .. 'aws4_request'   local canonicalquerystring = toquerystring({     { 'OutputFormat', 'mp3' },     { 'Text', text },     { 'TextType', 'text' },     { 'VoiceId', voice },     { 'X-Amz-Algorithm', algorithm },     { 'X-Amz-Credential', accesskey .. '/' .. credentialscope },     { 'X-Amz-Date', amzdate },     { 'X-Amz-SignedHeaders', signedheaders },   })   local payloadhash = encdec.sha256('')   local canonicalrequest = table.concat({     method,     api,     canonicalquerystring,     canonicalheaders,     '',     signedheaders,     payloadhash   }, '\n')   local stringtosign = table.concat({     algorithm,     amzdate,     credentialscope,     encdec.sha256(canonicalrequest)   }, '\n')   local signingkey = getkey(secretkey, datestamp, region, service)   local signature = encdec.hmacsha256(stringtosign, signingkey)   return endpoint .. '?' .. canonicalquerystring .. '&X-Amz-Signature=' .. signature end url = getpollyurl('testing polly from logic machine') require('ssl.https') res, status = ssl.https.request(url) if res then   -- res contains the mp3 file else   alert('Polly request failed: ' .. tostring(status)) end

[bmodeco]

Here's an example on how to access Amazon Polly. Make sure you set region, accesskey, secretkey and voice variables correctly.

This has been tested on the latest RC1 firmware, but you also need to install package updates to have support for sha256 function:
Standard LM: https://dl.openrb.com/misc/luaencdec_20170426_mxs.ipk
LM power version: https://dl.openrb.com/misc/luaencdec_20170426_imx6.ipk

Code:

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283

function getpollyurl(text)  -- CONFIG VARIABLES  local region = 'eu-west-1' -- your AWS region  local accesskey = 'xxx'  local secretkey = 'yyy'  local voice = 'Joey' -- list of voices: https://aws.amazon.com/polly/details/  -- same as JS encodeURIComponent  local function encode(str)    return (str:gsub("[^%w%-_%.%!%~%*%'%(%)]", function(c)      return string.format("%%%02X", c:byte(1,1))    end))  end  function toquerystring(items)    local res = {}    for _, item in ipairs(items) do      res[ #res + 1 ] = item[ 1 ] .. '=' .. encode(item[ 2 ])    end    return table.concat(res, '&')  end  function getkey(key, datestamp, regionname, servicename)    local kdate = encdec.hmacsha256(datestamp, 'AWS4' .. key, true)    local kregion = encdec.hmacsha256(regionname, kdate, true)    local kservice = encdec.hmacsha256(servicename, kregion, true)    return encdec.hmacsha256('aws4_request', kservice, true)  end  local encdec = require('encdec')  local method = 'GET'  local service = 'polly'  local host = service .. '.' .. region .. '.amazonaws.com'  local api = '/v1/speech'  local endpoint = 'https://' .. host .. api  local amzdate = os.date('!%Y%m%dT%H%M%SZ')  local datestamp = os.date('!%Y%m%d')  local algorithm = 'AWS4-HMAC-SHA256'  local canonicaluri = api  local canonicalheaders = 'host:' .. host  local signedheaders = 'host'  local credentialscope = datestamp .. '/' .. region .. '/' .. service .. '/' .. 'aws4_request'  local canonicalquerystring = toquerystring({    { 'OutputFormat', 'mp3' },    { 'Text', text },    { 'TextType', 'text' },    { 'VoiceId', voice },    { 'X-Amz-Algorithm', algorithm },    { 'X-Amz-Credential', accesskey .. '/' .. credentialscope },    { 'X-Amz-Date', amzdate },    { 'X-Amz-SignedHeaders', signedheaders },  })  local payloadhash = encdec.sha256('')  local canonicalrequest = table.concat({    method,    api,    canonicalquerystring,    canonicalheaders,    '',    signedheaders,    payloadhash  }, '\n')  local stringtosign = table.concat({    algorithm,    amzdate,    credentialscope,    encdec.sha256(canonicalrequest)  }, '\n')  local signingkey = getkey(secretkey, datestamp, region, service)  local signature = encdec.hmacsha256(stringtosign, signingkey)  return endpoint .. '?' .. canonicalquerystring .. '&X-Amz-Signature=' .. signature end url = getpollyurl('testing polly from logic machine') require('ssl.https') res, status = ssl.https.request(url) if res then  -- res contains the mp3 file else  alert('Polly request failed: ' .. tostring(status)) end

Hi admin,
Thanks a lot! I can confirm that it works as expected on RC1...
BR, Bart