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deepgram-data-handling Implement audio data handling best practices for Deepgram integrations.
Use when managing audio file storage, implementing data retention,
or ensuring GDPR/HIPAA compliance for transcription data.
Trigger: "deepgram data", "audio storage", "transcription data",
"deepgram GDPR", "deepgram HIPAA", "deepgram privacy", "PII redaction".
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name deepgram-data-handling description Implement audio data handling best practices for Deepgram integrations.
Use when managing audio file storage, implementing data retention,
or ensuring GDPR/HIPAA compliance for transcription data.
Trigger: "deepgram data", "audio storage", "transcription data",
"deepgram GDPR", "deepgram HIPAA", "deepgram privacy", "PII redaction".
allowed-tools Read, Write, Edit, Bash(aws:*), Bash(gcloud:*) version 1.0.0 license MIT author Jeremy Longshore <jeremy@intentsolutions.io> compatible-with claude-code, codex, openclaw tags ["saas","deepgram","data","compliance","privacy"]
Deepgram Data Handling
Overview
Best practices for handling audio and transcript data with Deepgram. Covers Deepgram's built-in redact parameter for PII, secure audio upload with encryption, transcript storage patterns, data retention policies, and GDPR/HIPAA compliance workflows.
Data Privacy Quick Reference
Deepgram Feature What It Does Enable redact: ['pci']Masks credit card numbers in transcript Query param redact: ['ssn']Masks Social Security numbers Query param redact: ['numbers']Masks all numeric sequences Query param Data retention Deepgram does NOT store audio or transcripts Default behavior
Deepgram's data policy: Audio is processed in real-time and not stored. Transcripts are not retained unless you use Deepgram's optional storage features.
Instructions
Step 1: Deepgram Built-in PII Redaction
import { createClient } from '@deepgram/sdk' ;
const deepgram = createClient (process.env .DEEPGRAM_API_KEY !);
const { result } = await deepgram.listen .prerecorded .transcribeUrl (
{ url : audioUrl },
{
model : 'nova-3' ,
smart_format : true ,
redact : ['pci' , 'ssn' ],
}
);
console .log
results
channels
0
alternatives
0
transcript
Step 2: Application-Level PII Redaction
const piiPatterns : Array <{ name : string ; pattern : RegExp ; replacement : string }> = [
{ name : 'email' , pattern : /\b[\w.-]+@[\w.-]+\.\w{2,}\b/g , replacement : '[EMAIL]' },
{ name : 'phone' , pattern : /\b(\+?\d{1,3}[-.\s]?)?\(?\d{3}\)?[-.\s]?\d{3}[-.\s]?\d{4}\b/g , replacement : '[PHONE]' },
{ name : 'dob' , pattern : /\b(0[1-9]|1[0-2])[\/.-](0[1-9]|[12]\d|3[01])[\/.-](19|20)\d{2}\b/g , replacement : '[DOB]' },
{ name : 'address' , pattern : /\b\d{1,5}\s[\w\s]+(?:Street|St|Avenue|Ave|Road|Rd|Drive|Dr|Lane|Ln|Boulevard|Blvd)\b/gi , replacement : '[ADDRESS]' },
];
function redactPII (text : string redacted : string ; found : string [] } {
let redacted = text;
const found : string [] = [];
for (const { name, pattern, replacement } of piiPatterns) {
const matches = text.match (pattern);
if (matches) {
found.push (`${name} : ${matches.length} occurrence(s)` );
redacted = redacted.replace (pattern, replacement);
}
}
return { redacted, found };
}
const transcript = result.results .channels [0 ].alternatives [0 ].transcript ;
const { redacted, found } = redactPII (transcript);
if (found.length > 0 ) console .log ('PII found and redacted:' , found);
Step 3: Secure Audio Upload and Storage import { S3Client, PutObjectCommand , GetObjectCommand } from '@aws-sdk/client-s3' ;
import { getSignedUrl } from '@aws-sdk/s3-request-presigner' ;
import { createHash, randomUUID } from 'crypto' ;
import { readFileSync } from 'fs' ;
const s3 = new S3Client ({ region : process.env .AWS_REGION ?? 'us-east-1' });
const BUCKET = process.env .AUDIO_BUCKET !;
async function uploadAudio (filePath : string , metadata : Record <string , string > = {}const audio = readFileSync (filePath);
const checksum = createHash ('sha256' ).update (audio).digest ('hex' );
const key = `audio/${randomUUID()} -${checksum.substring(0 , 8 )} .wav` ;
await s3.send (new PutObjectCommand ({
Bucket : BUCKET ,
Key : key,
Body : audio,
ContentType : 'audio/wav' ,
ServerSideEncryption : 'aws:kms' ,
Metadata : {
...metadata,
checksum,
uploadedAt : new Date ().toISOString (),
},
}));
const presignedUrl = await getSignedUrl (s3,
new GetObjectCommand ({ Bucket : BUCKET , Key : key }),
{ expiresIn : 3600 }
);
return { key, checksum, presignedUrl };
}
const { presignedUrl } = await uploadAudio ('./recording.wav' , { source : 'call-center' });
const { result } = await deepgram.listen .prerecorded .transcribeUrl (
{ url : presignedUrl },
{ model : 'nova-3' , smart_format : true , redact : ['pci' , 'ssn' ] }
);
Step 4: Transcript Storage Pattern interface StoredTranscript {
id : string ;
audioKey : string ;
requestId : string ;
transcript : string ;
confidence : number ;
duration : number ;
model : string ;
speakers : number ;
utterances ?: Array <{
speaker : number ;
text : string ;
start : number ;
end : number ;
}>;
metadata : {
redacted : boolean ;
piiTypesFound : string [];
createdAt : string ;
retentionPolicy : 'standard' | 'legal_hold' | 'hipaa' ;
expiresAt : string ;
};
}
function buildTranscriptRecord (
audioKey : string ,
result : any ,
retentionDays = 90
): StoredTranscript {
const alt = result.results .channels [0 ].alternatives [0 ];
const { redacted, found } = redactPII (alt.transcript );
return {
id : randomUUID (),
audioKey,
requestId : result.metadata .request_id ,
transcript : redacted,
confidence : alt.confidence ,
duration : result.metadata .duration ,
model : Object .keys (result.metadata .model_info ?? {})[0 ] ?? 'unknown' ,
speakers : new Set (alt.words ?.map ((w : any w.speaker ).filter (Boolean )).size ,
utterances : result.results .utterances ?.map ((u : any ({
speaker : u.speaker ,
text : u.transcript ,
start : u.start ,
end : u.end ,
})),
metadata : {
redacted : found.length > 0 ,
piiTypesFound : found,
createdAt : new Date ().toISOString (),
retentionPolicy : 'standard' ,
expiresAt : new Date (Date .now () + retentionDays * 86400000 ).toISOString (),
},
};
}
Step 5: Data Retention Policies const retentionPolicies = {
standard : { days : 90 , description : 'Default retention' },
legal_hold : { days : 2555 , description : '7 years for legal' },
hipaa : { days : 2190 , description : '6 years per HIPAA' },
temp : { days : 7 , description : 'Temporary processing' },
};
async function enforceRetention (db : any , s3Client : S3Client, bucket : string const now = new Date ();
const expired = await db.query (
'SELECT id, audio_key FROM transcripts WHERE expires_at < $1 AND retention_policy != $2' ,
[now.toISOString (), 'legal_hold' ]
);
console .log (`Found ${expired.rows.length} expired transcripts` );
for (const row of expired.rows ) {
try {
await s3Client.send (new DeleteObjectCommand ({
Bucket : bucket, Key : row.audio_key ,
}));
} catch (err : any ) {
console .error (`S3 delete failed for ${row.audio_key} :` , err.message );
}
await db.query ('DELETE FROM transcripts WHERE id = $1' , [row.id ]);
console .log (`Deleted: ${row.id} ` );
}
return expired.rows .length ;
}
Step 6: GDPR Right to Erasure async function processErasureRequest (userId : string , db : any , s3Client : S3Client, bucket : string console .log (`Processing GDPR erasure request for user: ${userId} ` );
const transcripts = await db.query (
'SELECT id, audio_key FROM transcripts WHERE user_id = $1' , [userId]
);
for (const row of transcripts.rows ) {
if (row.audio_key ) {
await s3Client.send (new DeleteObjectCommand ({ Bucket : bucket, Key : row.audio_key }));
}
}
const deleted = await db.query ('DELETE FROM transcripts WHERE user_id = $1' , [userId]);
await db.query ('DELETE FROM user_metadata WHERE user_id = $1' , [userId]);
console .log (JSON .stringify ({
action : 'gdpr_erasure' ,
userId : userId.substring (0 , 8 ) + '...' ,
transcriptsDeleted : deleted.rowCount ,
audioFilesDeleted : transcripts.rows .length ,
timestamp : new Date ().toISOString (),
}));
return { transcriptsDeleted : deleted.rowCount , audioFilesDeleted : transcripts.rows .length };
}
Output
Deepgram built-in PII redaction (pci, ssn, numbers)
Application-level PII redaction (email, phone, DOB, address)
Secure audio upload to S3 with KMS encryption
Transcript storage pattern with retention metadata
Automated retention enforcement
GDPR erasure workflow
Error Handling Issue Cause Solution PII still visible Deepgram redact not set Add redact: ['pci', 'ssn'] to options S3 upload fails Missing KMS permissions Add kms:GenerateDataKey to IAM role Retention not enforced Cron not running Schedule retention job, add monitoring Erasure incomplete Transaction failed Use database transactions for atomic delete
Resources 