Build drum patterns in your browser — click a 16-step grid to place hits, choose a genre preset, set your BPM, and hear it loop instantly. Download as MIDI to use in FL Studio, Ableton, Logic Pro, or any DAW.
Create professional drum patterns in three simple steps — no music theory required.
Click cells in the grid to place drum hits — or hit Randomize to generate a pattern instantly. Each row is a different instrument: kick, snare, hi-hat, open hi-hat, clap, and perc.
Drag the tempo slider to set your BPM, then hit Play to hear your beat loop in real time using your browser's Web Audio API — no plugins, no installs.
Export your pattern as a .mid file and drag it directly into any DAW — FL Studio, Ableton Live, Logic Pro, GarageBand, Reaper, or any software that accepts MIDI.
A drum beat generator is a tool that lets you create drum patterns by placing hits on a visual grid called a step sequencer. Each row represents a different drum sound — kick, snare, hi-hat, clap — and each column represents a point in time, typically 16 steps for one bar of music at a 4/4 time signature.
By clicking cells in the grid, you build a rhythm that loops continuously. Browser-based generators like this one use the Web Audio API to synthesize sounds in real time, so you hear your pattern immediately without installing any software.
The MIDI export feature takes your pattern and encodes it as a standard MIDI file using General MIDI drum mapping (Kick = note 36, Snare = note 38, Hi-Hat = note 42). This makes it compatible with virtually every drum plugin and DAW out of the box.
Not sure where to start? Here are five essential drum patterns used in popular genres. Use these as starting points and customize them to make your own beats. Step numbers correspond to the 16-step grid (1 = first 16th note of the bar).
The foundation of rock, pop, and most Western music. Kick on the downbeats, snare on the backbeats.
Kick: 1, 9
Snare: 5, 13
Hi-Hat: 1, 3, 5, 7, 9, 11, 13, 15 (8th notes)
The signature of modern hip-hop. Rapid hi-hats, booming 808 kick, and sparse snares.
Kick: 1, 8, 11
Snare: 5, 13
Hi-Hat: all 16 steps (16th notes)
Clap: 5, 13 (layered with snare)
Laid-back and dusty. Off-grid feel with swing, minimal hi-hats, and a punchy snare.
Kick: 1, 7, 9, 15
Snare: 5, 13
Hi-Hat: 3, 7, 11, 15 (upbeats)
Open Hi-Hat: 9
The four-on-the-floor foundation of dance music. Kick on every beat, open hi-hat on the offbeats.
Kick: 1, 5, 9, 13 (four-on-the-floor)
Clap: 5, 13
Hi-Hat: 1, 3, 5, 7, 9, 11, 13, 15
Open Hi-Hat: 3, 7, 11, 15 (offbeats)
The infectious Latin rhythm. Syncopated kick and snare pattern known as "dembow."
Kick: 1, 5, 9, 13
Snare: 4, 7, 12, 15 (dembow rhythm)
Hi-Hat: 1, 3, 5, 7, 9, 11, 13, 15
Title: Understanding and Resolving the “SSIS‑547” (Foreign‑Key Violation) Error in SQL Server Integration Services
Introduction SQL Server Integration Services (SSIS) is Microsoft’s premier platform for building data‑integration and workflow solutions. It excels at extracting, transforming, and loading (ETL) data across heterogeneous sources. Yet, because SSIS ultimately moves data into relational tables, it inherits the same integrity constraints that govern those tables. One of the most common—and often frustrating—runtime errors that SSIS developers encounter is Error 547 , the SQL Server foreign‑key violation message. In everyday conversation the error is sometimes abbreviated as “SSIS‑547” to remind developers that the problem originates from an SSIS data‑flow but is rooted in the underlying relational engine. This essay explores the mechanics of the 547 error, why it surfaces in SSIS packages, and, most importantly, how to anticipate, diagnose, and remediate it through design‑time best practices and run‑time handling strategies.
1. The Anatomy of Error 547 When SQL Server rejects a DML statement because it would break a referential integrity rule, it returns: Msg 547, Level 16, State 1, Line X The INSERT statement conflicted with the FOREIGN KEY constraint "FK_Child_Parent". The conflict occurred in database "MyDB", table "dbo.Parent", column 'ParentID'.
Key points: | Element | Meaning | |---------|---------| | Msg 547 | The error number assigned by the SQL Server engine. | | Level 16 | Indicates a user‑correctable error (as opposed to a system failure). | | State 1 | Provides additional context for internal diagnostics (rarely needed by developers). | | FK_Child_Parent | The name of the foreign‑key constraint that was violated. | | Conflict location | Identifies the exact table/column that lacked the required reference. | The violation occurs when a child row references a parent row that does not exist, or when an attempt is made to delete or update a parent row while related child rows remain, and the constraint’s ON DELETE/UPDATE action does not permit the operation. ssis-547
2. Why SSIS Packages Trigger Error 547 Although the error is produced by the relational engine, SSIS can unintentionally provoke it in several common scenarios: | Scenario | Typical SSIS Pattern | Why the Violation Happens | |----------|----------------------|----------------------------| | Missing Lookup Values | Using a OLE DB Destination to bulk‑load fact rows that reference dimension keys. | The lookup component may return NULL or an invalid surrogate key, causing the INSERT to reference a non‑existent parent. | | Staging‑to‑Production Loads | Loading staging tables first, then moving data to production tables via an Execute SQL Task . | The staging load succeeds, but the subsequent transformation does not ensure that all foreign keys are satisfied before the final INSERT. | | Parallel Data Flows | Running two data flows concurrently: one populating the parent table, the other populating the child table. | The child flow may start before the parent rows are committed, especially when the package uses separate transactions or FastLoadOptions that delay transaction commits. | | Incorrect Data Type Mapping | Mapping a source string column to an integer foreign‑key column without proper conversion. | Implicit conversion fails or yields a value that does not exist in the parent table. | | Cascade Delete/Update Misconfiguration | Deleting rows from a parent table without first removing dependent child rows. | The delete task violates the foreign‑key rule unless ON DELETE CASCADE is defined. |
3. Design‑Time Strategies to Prevent 547 Errors Prevention is far more efficient than handling the error after it occurs. The following design‑time practices dramatically reduce the likelihood of encountering SSIS‑547. 3.1. Enforce Referential Integrity Early with Lookups
Cache Lookups – Use the Lookup Transformation in Full Cache mode to pull the complete set of parent keys into memory. This allows immediate validation of each child row before it reaches the destination. Redirect Rows – Configure the Lookup’s Redirect rows to no match output to capture offending rows into a separate error flow. Store them in a staging table for manual review rather than letting them cause a hard failure. the other populating the child table.
3.2. Staging Areas with Auditing
Staging Tables without Constraints – Load raw source data into staging tables that intentionally lack foreign‑key constraints. Pre‑Load Validation Scripts – Run EXEC sp_MSforeachtable or custom T‑SQL scripts that flag orphaned rows ( NOT EXISTS checks) before moving data to the production schema.
3.3. Transaction Management
Package‑Level Transactions – Set TransactionOption = Required on the package and ensure that the parent‑load data flow completes before the child‑load starts. Batch Commit Size – When using FastLoad in an OLE DB Destination , tune Rows Per Batch and Maximum Insert Commit Size to balance throughput with the ability to roll back only the offending batch.
3.4. Data Type and Mapping Discipline